material: premium chrome vanadium steel drop forged, entirely hardened and tempered surface finish: zinc plated according to ISO 2081:2018 (E) ergonomic heavy duty double component handle Advantages: Set includes 6 pcs of expandable collet for inner bearing dimensions 6.5-8,10-12, 12-15, 17-20, 22-28, 30-36 Usage: It is used for extraction of different typ of bearing. Expandable collet grips inner bearing race. and pulls it out. The bearing is extracted by impact forces of 1kg sliding hammer. Profiles Documentation Inner bearing puller - 689/5BI Instruction manual