High quality brass collets to fit Dremel, other rotary tools, pin vises Compatible with most rotary tools used in hardware, hobby, home etc Specifications: Clamping Diameter :1mm/1.6mm/2.3mm/3.2mm(0.04",0.06",0.091",0.126") Shank Dia :4.3mm/4.3mm/4.3mm/4.3mm(0.17",0.17",0.17",0.17") Overall Length :17mm/0.67" Material :Brass Color :Golden Measurement error Rang: 0.05mm Included in the Package: 2sets 8pcs Brass Collet (size including 1mm/1.6mm/2.3mm/3.2mm and 2pcs one size)Product Description