C-6 Carbide insert and Torx® wrench included with each tool. Positive rake for smooth cutting without chatter. Carbide indesable, No tool resharpening needed. Uses standard triangle and square inserts. 60° with stand. Includes 3 pieces: 1/4 - 3/4" (insert no.: TPGH321), 1/2 - 1-3/4" (insert no.: SPGH433), 1-1/4 - 2-1/2" (insert no.: SPGH433).