Product Description: Advantages: 1.Every product has a unique Manufacturing Part Number label on the inner package that proves it has been qualified,which include Part Number,Model Number and inspection date information 2.If you have any questions about the item,please provide us the Manufacturing Part Number for checking,your profits will be guaranteed.3.ER straight rod type collet extension handle, the handle body is relatively long, suitable for deep hole processing.4.Use for motor Rod Extension,can replace the drill clip,with ER collet perfect match for all kinds of straight shank tools.5.The outer diameter of the rod and other parts of the rod can be eliminated by precision grinding, which can eliminate the unbalance and increase the stability of the cutting. The traditional ER chuck is easy to be locked in the cutter bar when it is installed, and cannot be removed. The eccentric nut is removed together with the chuck and cutter tool when the nut is removed. It nicely solves that problem. Installation Steps:1.Remove the nut and insert the collet eccentrically2. Insert the cutter3. Tighten the nut4. Pull out the cutter5. Eccentrically remove the colletSpecifications:Material:40CRColor:Silver & BlackSuitable Chuck: ER20Nut Type: Type ARod Hole Dia:10mmRod Diameter:25mmSize:56.5x33.7mm/2.22x1.32inch(L x Dia)Weight:196g Package include:1 x Motor Shaft Collet