Stahlwille 54100073 QuickRelease Safety Lock - Size 4

Designed to prevent insert tools from being swapped by locking the safety lock in place on the head of the torque wrench with a safety screw. Once the protection system has been fitted, it is possible to attach an insert tool but not to remove it because the QuickRelease unlock button itself is locked. After the safety screw has been removed, the torque wrench reverts to being a standard, versatile tool. The safety screw can be fitted and removed using a TORX screwdriver with a central bore in the tip or a BITS screwdriver insert with a central bore in the tip.