ITEM NAME:Mt3 Er25 M12 Collet Chuck Holder Fixed Cnc Milling Turning Tools + 1Pc Span N1F5 Mt3 Er25 M12 Collet Chuck Holder Fixed Cnc Milling Turning Tools + 1Pc Span N1F5 MT3-ER25 Specifically with Designed with Collet Specifications: ER25 Clamping diameter range: 3-20mm Locking nut Specifications: ER25 ER Straight extension rods, shank body longer for deep hole machining. Straight-type handle body, for holding small drilling, milling tools. You can reduce the use of longer tools, which can reduce costs, improve efficiency Stability diameter, and other parts have been precision ground to eliminate unbalance, increased cutting of Durable, high precision, tighten the nut straight, high rigidity, strong clamping Color: silver material: metal Package Included 1 x Extension Pole+1 x Spanner.Designed with Collet Specifications: ER25. Locking nut Specifications: ER25. Straight-type handle body, for holding small drilling, milling tools. 1 x Extension Pole+1 x Spanner. Durable, high precision, tighten the nut straight, high rigidity, strong clamping.