7Pcs/set Brass Drill Chucks Collet Bits 1-3.2mm Shank Screw Nut Dremel Rotary Tool Specifications: Color: Gold Material: Metal Total Length: 17mm / 0.66’’ Stem Diameter: 4.8mm/1.89’’ Clamping diameter: 1mm, 1.6mm, 2mm, 2.4mm, 3mm, 3.2mm Durable and practical Compatible with most rotary tools used in hardware, hobbies, home, etc Suitable for installing an inner diameter of less than 4.8mm of drilling, electric grinding, hanging grinder, pipe above Package includes: 6 x Metal Chucks Collets 1 x screw nut