DescriptionThis item is a pack of 8pcs brass collets, which including 4 different sizes. brass collets to fit rotary tools, pin vises. It is compatible with most rotary tools used in hardware, hobby, home etc.Features- Color: Golden.- Material: Brass.- Overall Length: 17mm.- Clamping Diameter: 1mm/1.6mm/2.3mm/3.2mm.- Diameter: 5mm/4.3mm/4.3mm/4.3mm.- Measurement error range: 0.5-1.5mm.- brass collets to fit rotary tools, pin vises.- Compatible with most rotary tools used in hardware, hobby, home etc.