Extractor: three arms.Made of special steel.Galvanised finish.Especially suited for pulling ball bearings, pulleys and gears etc..Spare body.4542-A/B for 4542-A.4542-B/B for 4542-B.4541K Spare arm.Spare spindle.4532-OAB/S for 4542-A (M14 x 1.5 x 135, SW 17, 190 g).4519-1/S for 4542-B (M18 x 1.5 x 240, SW 19, 485 g).Sturdy construction of the claws. Resists heavy stress