General description Drywall Guide Bit 6.35mm (1/4") designed for use with the DCO180Z Drywall Cutter. This set includes 3 cutters, ideal for fast production of cut-outs in plasterboard. Technical specifications Bit diameter: 6.35mm (1/4") Quantity: 3 cutters included Usage Designed for cutting plasterboard efficiently. Features a point to plunge and a wide spiral flute for fast waste removal.