ITEM NAME:C10 Er8A 100L Collet Chuck Holder + 7Pcs Precision Er8 Spring Collet Set R6Y8 C10 Er8A 100L Collet Chuck Holder + 7Pcs Precision Er8 Spring Collet Set R6Y8 Shank diameter: 10mm Shank length: 100mm Extension rod diameter and the other parts are precision ground to eliminate unbalance, increase safety when cutting. It can reduce the use of extension tools, which can reduce costs and improve efficiency Spring Collect is highly clamping force, wide clamping range, high accuracy Widely used in boring, milling, drilling, tapping, grinding and other processing 3.Extension rod diameter and the other parts are precision ground to eliminate unbalance, increase safety when cutting. 4.It can reduce the use of extension tools, which can reduce costs and improve efficiency 5.Spring Collect is highly clamping force, wide clamping range, high accuracy 6.Widely used in boring, milling, drilling, tapping, grinding and other processing Color: silver + black Material: Steel Shank chuck model:C10 ER8A 100L Spring Collect Gripping Range:2MM to 5MM (2mm,2.5mm,3mm,3.5mm,4mm,4.5mm,5mm) Spring Collect MODEL:ER8 Package include: 1 x Straight shank chuck 7 x Spring collect