Works with all RotoZip spiral saw tools and Drywall routers Keep your RotoZip tool running at full capacity with replacement collets Replacement collet for all bit sizes Kit Includes: 3 collets (1/8-Inch, 5/32-Inch, 1/4-Inch) and nut Replacement collets for 1/8-Inch, 5/32-Inch, 1/4-Inch bits