ITEM NAME:15pcs/set ER11 Precision Spring Collet Set For CNC Engraving Machine Lathe Mi Y8 15pcs/set ER11 Precision Spring Collet Set For CNC Engraving Machine Lathe Mi Y8 Brand new MODEL: ER11 1-7mm & 1/8 1/4 inch Material: 65Mn Precision: Less than 0.012 Height: about 0.68 inch Outside diameter: about 0.45 inch (11mm) Color: Silver Quantity: 15pcs per set Size: 1/1.5/2/2.5/3/3.5/4/4.5/5/5.5/6/6.5/7mm+1/8 INCH+1/4 INCH (each size for one piece) For CNC milling Lathe Tool & Workholding Engraving machine! Good elasticity, high precision Using high quality spring steel is table in performance Package included: 15pcs x CNC ER11 collet set Only the above package content, other products are not included. Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm..15pcs x CNC ER11 collet set. Quantity: 15pcs per set. For CNC milling Lathe Tool & Workholding Engraving machine! Precision: Less than 0.012. Good elasticity, high precision. Using high quality spring steel is table in performance.