Engineered for durability and performance, the Rotozip GP16 1/8-Inch Drywall Guide point Cutting ZipBit is perfect for controlled drywall cut-outs when used with your RotoZip Spiral Saw power tool. The guide point tip traces around outlet boxes and can lights. Zip Bits allow you to cut material up to 1-Inch thick. For use with RotoZip Spiral Saw power tools.