Features: heat treated. 12 Pcs carbon steel holesaws: 3/4, 7/8, 1-1/8, 1-1/4, 1-1/2, 1-3/4,. 2, 2-1/2, 3, 3-1/2, 4 and 5 inch. 2 Pcs mandrels. 1 Pc hex key wrench. 1 Pc installation plate. Holesaw are suitable for: wood, thin alloy sheet and thin metal sheet. Weight: 3.2 Lbs.