Collet and nut kit, Replaces CT125, CT156 and CT250, Includes all 3 collets and collet nut for replacement keeping your RotoZip tool running, Compatible with both RotoZip spiral saw tools, and drywall routers, Includes one 1/8"" collet, one 5/32"" collet, one 1/4"" collet and nuts, Length: 9, 37, Width: 3, 56, Height: 5, 5 SKU: JNSN61490