3 Piece 10″ 1.5mm X 80 Degree Extra-Height 100mm Steel Soft Jaw Set ~ Extra-height jaws are suitable for longer work pieces. For example, for 4″ length work pieces you need jaws with over 3″ tall to increase the accuracy and stability of production process. ~ Supplies maximum concentricity on finish turning operations. ~ Jaws can be hardened. ~ Jaws can also be bored or turned to fit work piece. ~ Groove width D is 0.630 (16mm). ~ Screw size E is 1/2″ (M12). ~ Hole space F is 1.181 (30mm). ~ Hole to front H is 1.969. ~ Jaw length C is 1.57. ~ Jaw length A is 4.33. ~ Jaw height is 3.94 (100mm). ~ Can be used on Kitagawa, Samchully, Strong, MMK, SMW Autoblok, Howa & Hitachi-Seiki chucks. ~ Taiki # TW-305A4 Extra-height jaws are suitable for longer work pieces. Supplies maximum concentricity on finish turning operations. Jaws can be hardened. Jaws can also be bored or turned to fit work piece. Can be used on Kitagawa, Samchully, Strong, MMK, SMW Autoblok, Howa & Hitachi-Seiki chucks.