17Pcs/Set Carbide Drill Bits C Set Durable Use Tools for Woodworking Description: Heat treated teeth For hard and soft woods, plastic, plasterboard and non ferrous metals. Features: 17 piece hole saw set for cutting tide accurate holes. All 17pcs in the set are heat treated enabling them to be suitable for soft and hard wood, plasterboard, plastic and non ferrous metals. All 17pcs come in a handy blow moulded carry/storage case. Package Included: Contains 13 hole saws 19, 22, 25, 28, 32, 38, 44, 51, 64, 76, 89, for 102 and 127mm 6mm (1/4") and 10mm (3/8") arbors Reinforcing plate and hex key. Note:Please note that the new type and old type of this product will be sent randomly, and make sure you will not mind before ordering.