Heat treated teeth. For hard and soft woods, plastic, plasterboard and non ferrous metals. Contains 12 holesaws 19, 22, 29, 32, 38, 44, 51, 64, 76, 89, 102 and 127mm; 6mm (1/4″) and 10mm (3/8″) arbors; Reinforcing plate and hex key. In robust storage case. Heat treated teeth. For hard and soft woods, plastic, plasterboard and non ferrous metals. Contains 12 holesaws 19, 22, 29, 32, 38, 44, 51, 64, 76, 89, 102 and 127mm; 6mm (1/4″) and 10mm (3/8″) arbors; Reinforcing plate and hex key. In robust storage case.