ITEM NAME:3pcs Woodworking Milling Cutter Chuck Conversion Set Woodwor Tool OHQ.Size: small collet 8mm: 16.5 11.8mm, small collet 6mm: 16.5 11.8mm, small collet 6.35mm: 20 12.7mm. Product list: small collet 8mm/6mm/6.35mm each 2. We'd like to settle any problem in a friendly manner.