Chip TAIKI extra height soft steel jaw is suitable for longer work piece, such as 4 inch Length work piece will need jaws with over 3 inch height which will increase the accuracy and stability of production process. Supplies maximum concentricity on finish turning operations. Price is for a set of 3 jaws. Jaws can be hardened. Can be bored or turned to fit work piece. For use on: kitagawa, samchully, strong, mmk, smw auto Blok, how a and hitachi-seiki chucks. Product specifications: 1. 5mm x 60 degree serrations. Chuck size: 8; groove width D: 0. 551 (14mm); screw size E: 1/2 (M12); hole space F: 0. 984(25Mm); hole to front H: 1. 811; jaw width C: 1. 38; jaw Length a: 3. 74; jaw height b: 3. 94(100Mm). Taiki # SJ08100B