uxcell 7mm 7/25 Inch ER16 Series Spring Collet Chuck Tool Bit Holder Product Name : Spring Collet;Model No. : ER16 Clamping Range : 7mm-6mm/ 7/25"-15/64";Clamping Diameter : 7mm/ 7/25" Overall Size : 16 x 28mm/ 0.6" x 1.1"(Max.Dia*H);Material : Stainless Steel Color : Silver Tone;Net Weight : 18g Package Content : 1 x Spring Collet