Screwdriver bit holder torque insert tools 9x12 mm with safety pin made of chrome-vanadium steel suitable for heavy loads effective length 17.5 mm for hexagon bit size 1/4 inch shape C6.3
Square drive wrench torque insert tools 9x12 mm with safety pin made of chrome-vanadium steel suitable for heavy loads effective length 17.5 mm size 1/2 inch
Square drive wrench torque insert tools 9x12 mm with safety pin made of chrome-vanadium steel suitable for heavy loads effective length 17.5 mm size 3/8 inch
Square drive wrench torque insert tools 9x12 mm with safety pin made of chrome-vanadium steel suitable for heavy loads effective length 17.5 mm size 1/4 inch
Reversible ratchet torque insert tools 9x12 mm 72 teeth with safe socket lock made of chrome-vanadium steel suitable for heavy loads effective length 20.0 mm size 1/2 inch
Reversible ratchet torque insert tools 9x12 mm 72 teeth with safe socket lock made of chrome-vanadium steel suitable for heavy loads effective length 17.5 mm size 3/8 inch
Reversible ratchet torque insert tools 9x12 mm 72 teeth with safe socket lock made of chrome-vanadium steel suitable for heavy loads effective length 17.5 mm size 1/4 inch
Ring wrench torque insert tools 9x12 mm with safety pin made of chrome-vanadium steel suitable for heavy loads overall length 51 mm effective length 17.5 mm size 21 mm
Ring wrench torque insert tools 9x12 mm with safety pin made of chrome-vanadium steel suitable for heavy loads overall length 44 mm effective length 17.5 mm size 19 mm
Ring wrench torque insert tools 9x12 mm with safety pin made of chrome-vanadium steel suitable for heavy loads overall length 44 mm effective length 17.5 mm size 18 mm
Ring wrench torque insert tools 9x12 mm with safety pin made of chrome-vanadium steel suitable for heavy loads overall length 44 mm effective length 17.5 mm size 17 mm
Ring wrench torque insert tools 9x12 mm with safety pin made of chrome-vanadium steel suitable for heavy loads overall length 44 mm effective length 17.5 mm size 16 mm
Ring wrench torque insert tools 9x12 mm with safety pin made of chrome-vanadium steel suitable for heavy loads overall length 44 mm effective length 17.5 mm size 15 mm
Ring wrench torque insert tools 9x12 mm with safety pin made of chrome-vanadium steel suitable for heavy loads overall length 44 mm effective length 17.5 mm size 14 mm
Ring wrench torque insert tools 9x12 mm with safety pin made of chrome-vanadium steel suitable for heavy loads overall length 44 mm effective length 17.5 mm size 13 mm
Ring wrench torque insert tools 9x12 mm with safety pin made of chrome-vanadium steel suitable for heavy loads overall length 44 mm effective length 17.5 mm size 12 mm
Ring wrench torque insert tools 9x12 mm with safety pin made of chrome-vanadium steel suitable for heavy loads overall length 41 mm effective length 17.5 mm size 11 mm
Ring wrench torque insert tools 9x12 mm with safety pin made of chrome-vanadium steel suitable for heavy loads overall length 41 mm effective length 17.5 mm size 10 mm
Ring wrench torque insert tools 9x12 mm with safety pin made of chrome-vanadium steel suitable for heavy loads overall length 41 mm effective length 17.5 mm size 9 mm
Ring wrench torque insert tools 9x12 mm with safety pin made of chrome-vanadium steel suitable for heavy loads overall length 41 mm effective length 17.5 mm size 8 mm
Ring wrench torque insert tools 9x12 mm with safety pin made of chrome-vanadium steel suitable for heavy loads overall length 41 mm effective length 17.5 mm size 7 mm
Open end torque insert tools 9x12 mm with safety pin made of chrome-vanadium steel suitable for heavy loads loads overall length 41 mm effective length 17.5 mm size 19 mm
Open end torque insert tools 9x12 mm with safety pin made of chrome-vanadium steel suitable for heavy loads loads overall length 41 mm effective length 17.5 mm size 18 mm
Open end torque insert tools 9x12 mm with safety pin made of chrome-vanadium steel suitable for heavy loads loads overall length 41 mm effective length 17.5 mm size 17 mm
Open end torque insert tools 9x12 mm with safety pin made of chrome-vanadium steel suitable for heavy loads loads overall length 41 mm effective length 17.5 mm size 16 mm
Open end torque insert tools 9x12 mm with safety pin made of chrome-vanadium steel suitable for heavy loads loads overall length 41 mm effective length 17.5 mm size 15 mm
Open end torque insert tools 9x12 mm with safety pin made of chrome-vanadium steel suitable for heavy loads loads overall length 41 mm effective length 17.5 mm size 14 mm
Open end torque insert tools 9x12 mm with safety pin made of chrome-vanadium steel suitable for heavy loads loads overall length 41 mm effective length 17.5 mm size 13 mm
Open end torque insert tools 9x12 mm with safety pin made of chrome-vanadium steel suitable for heavy loads loads overall length 39 mm effective length 17.5 mm size 12 mm
Open end torque insert tools 9x12 mm with safety pin made of chrome-vanadium steel suitable for heavy loads loads overall length 39 mm effective length 17.5 mm size 11 mm
Open end torque insert tools 9x12 mm with safety pin made of chrome-vanadium steel suitable for heavy loads loads overall length 39 mm effective length 17.5 mm size 10 mm
Open end torque insert tools 9x12 mm with safety pin made of chrome-vanadium steel suitable for heavy loads loads overall length 39 mm effective length 17.5 mm size 9 mm
Open end torque insert tools 9x12 mm with safety pin made of chrome-vanadium steel suitable for heavy loads loads overall length 39 mm effective length 17.5 mm size 8 mm
Open end torque insert tools 9x12 mm with safety pin made of chrome-vanadium steel suitable for heavy loads loads overall length 39 mm effective length 17.5 mm size 7 mm
Reversible ratchet torque insert tools 9x12 mm with fine tooth 60 teeth maximum load capacity up to 100 Nm size 3/8 inch
Reversible ratchet torque insert tools 9x12 mm with fine tooth 60 teeth maximum load capacity up to 100 Nm size 1/2 inch
Reversible ratchet torque insert tools 14x18 mm with fine tooth 60 teeth maximum load capacity up to 650 Nm size 3/4 inch (heavy duty)
Reversible ratchet torque insert tools 14x18 mm with fine tooth 60 teeth maximum load capacity up to 300 Nm size 1/2 inch
Fixed square drive head torque insert tools 9x12 mm maximum torque 80 Nm size 3/8 inch
Fixed square drive head torque insert tools 9x12 mm maximum torque 40 Nm size 1/4 inch
Fixed square drive head torque insert tools 9x12 mm maximum torque 100 Nm size 1/2 inch
Fixed square drive head torque insert tools 14x18 mm maximum torque 650 Nm size 3/4 inch
Fixed square drive head torque insert tools 14x18 mm maximum torque 300 Nm size 1/2 inch
Open ring wrench torque insert tools 9x12 mm Drop-forged hardened and cooled in oil with chromium over nickel finish effective length 20 mm size 24 mm
Open ring wrench torque insert tools 9x12 mm Drop-forged hardened and cooled in oil with chromium over nickel finish effective length 20 mm size 22 mm
Open ring wrench torque insert tools 9x12 mm Drop-forged hardened and cooled in oil with chromium over nickel finish effective length 17.5 mm size 19 mm
Open ring wrench torque insert tools 9x12 mm Drop-forged hardened and cooled in oil with chromium over nickel finish effective length 17.5 mm size 17 mm
Open ring wrench torque insert tools 9x12 mm Drop-forged hardened and cooled in oil with chromium over nickel finish effective length 17.5 mm size 16 mm
Interchangeable Torque Insert Tools & Insert Heads for Open-Head Torque Wrenches
Explore ConnexTool's extensive 795-piece range of torque insert tools — interchangeable heads engineered by Stahlwille, Hazet, Wera, and Bahco to fit standard insert-type (headless) torque wrenches. Available across eight standardized insert-square sizes from 9x12 mm up to 27x36 mm, plus round R16 mm and R22 mm profiles, these heads let a single calibrated wrench body serve dozens of drive, ring, open-end, and specialty fastening configurations without the cost of multiple complete tools.
Standardized Insert-Square Interfaces, Reversible Ratchet Geometry & Size-Converter Adapters
Insert tools in this category share a standardized rectangular insert-square profile that locks securely into any matching open-head torque wrench or torque multiplier, decoupling the calibrated drive mechanism from the fastening interface entirely. Reversible ratchet heads such as Stahlwille's 725/735/737 series and Hazet's 6404 range are available with tooth counts from 22 to 60, where a finer tooth pitch reduces the swing arc needed to re-engage the ratchet in confined spaces. Open-end, ring, and split-ring insert heads (Stahlwille's 731/732/733 series, Bahco's 147/167 spigot profiles) suit applications where a socket cannot reach the fastener, while Wera's self-adjusting Joker heads cover a spanning range of metric and imperial sizes in a single unit. Size-converter adapters — such as Stahlwille's 7370 series — allow a wrench fitted for one insert square to accept heads of a different size, and dedicated calibration heads without ball-lock retention support laboratory torque verification rather than field fastening.
A Comprehensive Blueprint of Torque Insert Head Configurations
Our catalog spans every head profile and insert-square size for open-head torque wrench systems:
- ✔ Reversible Ratchet Insert Heads: Stahlwille 725/735/737 and Hazet 6404 series with tooth counts from 22 to 60, spanning 9x12 mm to 24.5x28 mm insert squares for confined-space applications.
- ✔ Open-End, Ring & Split-Ring Insert Heads: Stahlwille's 731/732/733 series and Bahco's 147/167 spigot-profile heads, reaching fasteners that socket-type heads cannot access.
- ✔ Self-Adjusting & Torx-Profile Insert Heads: Wera's Joker self-adjusting heads covering a size range in one unit, plus Stahlwille's 732TX Torx-profile heads for E-type fastener geometries.
- ✔ Size-Converter Adapters & Calibration Heads: Stahlwille's 7370 series for cross-size compatibility between insert squares, and 734K calibration heads without ball-lock retention for lab-grade torque verification.
Invest in professional-grade torque systems at ConnexTool, featuring 100% authentic inventory sourced directly from authorized European tool repositories.
