4 Piece Spot Weld Cutter SetSpot Weld Cutter - 1/2 In The Keysco Spot Weld Cutter can be used in either an electric or pneumatic drill. Operates at speeds up to 2000 rpm. The Keysco Cutter leaves a clean hole that requires very little grinding. Self-centering point minimizes walking, will not require a punch. Solid one piece construciton will not break or snap. Factory resharpening service. U.S. Patent No. D401,489. Made in USA. Includes: 3/8" - 2 1/4" for most spot welds. 5/16" for smaller spot welds. 1/4" x 2 1/4" for even smaller spot welds. 1/2" x 2 1/4" for big spot welds. Full warranty against leaks.