Content: screw set, clamping/release key with spring, 3 pcs cams with inward steps, 3 pcs cams with outward steps
All components which are important for transmitting the chucking force are hardened and ground
Reversible top jaws hardened and ground ISO3442
Pinion made from case hardened nickel chromium alloy steel hardened to 45°HRC. All bearing parts ground to finest limits
Pinion and operating screws recessed into the chuck body to reduce the risk of accidents
Chucks bodies made out of special cast iron jaw guides hardened and ground 180–210 Bhn
DIN55027 / GOST125893-72 
Conical mount