Engineered for durability and performance, the RotoZip ZB16 1/8-Inch Standard Point Drywall Cutting ZipBit will help you make quick, controlled cuts in drywall. Zip Bits allow you to cut material up to 1-Inch thick. The ZB16 bits are made of steel and feature a 1/8-Inch shank. This pack comes with 16-bits. For use with RotoZip Spiral Saw power tools.