EWK 10 Pc Heavy Duty Hollow Punch Kit Tool Set Gasket Leather Rubber Holes HD 1. 9 pieces punch size range SAE MM (2 , 3 , 4 , 5 , 6 , 7 , 8 , 9 , 10MM) 2. Includes the handle the punches attach to and the handy case. 3. Heavy duty heat treated carbon steel construction 4. Knurled bodies for a secure grip.