IRWIN WELDTEC SHIP AUGER 1-1/16 x 17 7/16 quick change impact shank Full forge...IRWIN WELDTEC SHIP AUGER 1-1/16 x 17 7/16 quick change impact shank Full forged body on bits 3/4 diameter or larger Speedbor with Weldtec ship auger bits are made stronger and last longer Harder cutting edge is welded to the base material 2 times...more