ITEM NAME:Steel ER11 Spring Collet + CNC Mill C12-ER11M-100L Straight Shank Chuck wit V7G5 Steel ER11 Spring Collet + CNC Mill C12-ER11M-100L Straight Shank Chuck wit V7G5 Have straight extended shank, long shank fit for deep processing Made from steel,can be used for a long time The Spring Collet have highly clamping force, wide clamping range, high accuracy Widely used in boring, milling, drilling, tapping, grinding and other processing Spring Collet Specifications: Gripping Range: 1.5MM to 7MM MODEL: ER11 Length: 18mm Diameter: 11.5mm Shank + Wrench Specifications: Shank diameter: approx. 12mm Shank length: 100mm Wrench length: 95mm Color: Silver Material: steel Weight: 232g Package included: 1 x Shank 1 x Wrench 13 x ER11 Collets(1mm,1.5mm,2mm,2.5mm,3mm,3.5mm,4mm,4.5mm,5mm,5.5mm,6mm,6.5mm,7mm) 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.