8″ 3 Piece 1/16 X 90 Degree Steel Soft Jaw Set ~ Supplies maximum concentricity on finish and turning operations. ~ Can be bored or turned to fit workpiece. ~ Jaws can be hardened. ~ Made of SAE1045 steel. ~ Groove width (D) is 0.669. ~ Screw size (E) is 12mm. ~ Hole space (F) is 0.875. ~ Hole to front (H) is 1.929. ~ Width (C) is 1.38. ~ Length (A) is 3.74. ~ Height (B) is 1.46. ~ Taiki # TW-305A4 Supplies maximum concentricity on finish and turning operations. Can be bored or turned to fit workpiece. Jaws can be hardened. Made of SAE1045 steel.