Material: special tool steel, hardened and tempered

The tool is composed of a wrench, screw with nut and handle. To use, put the wrench onto the bottom bracket nut, so that the screw is inserted into the bottom bracket. This prevents the wrench from slipping and damaging the bottom bracket nut when applying pressure. Your work is made easy by the 350 mm long handle with a two-component ergonomic sleeve. An additional part on the screw is a 19 mm AF to be used with a 19 mm wrench and for torque checking with a torque wrench. The wrench can also be used independently with a 19 mm wrench without the screw with nut and handle.