12 Pcs Brass Collet Chuck Shank for Dremel Rotary Tools, Mellbree 0.8mm 1.0mm 1.2mm 1.5mm 1.6mm 1.8mm 2.0mm 2.3mm 2.4mm 3.0mm 3.2mm Drill Lock Nut for Dremel 225 3000 4000 4250 4485 8220