1/4 in. HSS Drywall Zip Rotary Tool Spiral Saw Guidepoint Tip Bits for Cutting Drywall for Window/Door Openings - China Spiral Saw Drywall Cutout Bit, Guide Point Drywall Cutout Zip Bits
Rotozip Drywall cut out tool bits 1/8(3mm) Pack Of 8. STANDARD POINT. | eBay