The 9point8 TorqueKey is an innovative, inexpensive alternative to costly torque wrenches. Currently available in 4mm Allen hex, one of the most common sizes on bicycles.
The TorqueKey operates by correlating the deflection of the key to a known torque scale. The more the key defects, the more torque is being applied to the fastener.
Break your TorqueKey orange plastic scale? Want to 3D print a replacement? 9point8 offers free downloadable files for 3D printing accessories and tools on our THINGIVERSE page.