Wilton 14846 P-4, Prism Jaw Cap, 4-Inch Jaw Width, 2 -Pack Model P - Prism Magnefix Jaw Caps Jaw Construction Includes A 120-Degree Horizontal V-Groove, Three Vertical V-Grooves And A 90-Degree Groove For Marking Out And Center Punching Ideal For Light Tapping And Thread Cutting