This Set includes 8 x 3.2mm Drill Bits, which are also suitable for controlled drilling in timber, plastic and metal. These Drill Bits are ideal for making plunge cuts in plasterboard to accommodate openings for electrical and plumbing fittings. Each Drill Bit also has a guide point for precision drilling in thin materials and helps prevent them punching through. Sharpened edges eject hot wood chips and debris more efficiently and helps prevent jamming and scorch marks.