Straight Shank Collet Chuck Holder with 7pcs ER11 1-7mm Spring Collet Chuck for CNC Lather Milling Tool

Description: Collet Chuck Holder with 13pcs ER11 1-7mm Spring Collet Chuck.     Specification:  Holder:  Material: Steel.  Hardness: HRC46-50.  Accuracy: 0.01.  Size: Approx.131x25mm/5.16"x0.98".  Shank Diameter: 12mm/0.47".  Shank Length: Approx. 100mm/3.94".  Spring Collet:  Material: carbon steel.  Total height: 18mm.  Outer diameter(Max): 11.5mm.  Gripping range: 1mm to 7mm. (1mm, 1.5mm, 2mm, 2.5mm, 3mm, 3.5mm, 4mm, 4.5mm, 5mm, 5.5mm, 6mm, 6.5mm, 7mm) Fits metric shank size(s): For example,1mm collet fits 1mm metric shank, 2mm collet fits 2mm metric shank.     Features:  - Straight shank type extended handle, the long handle body apply to deep processing, solving the need to extend the depth of processing.  - You can reduce the use of extension tools, which can reduce costs and improved efficiency.  - Extension rod diameter and other parts are precision ground, can eliminate imbalance, increased safety when cutting.  - Tighten the nut directly,are high in rigidity and clamping for