Features Good clamping strength and accuracy, long service life and good performance. Can be connected with drill chuck extension rod, safe and fast replacement of tapping chuck. Time‑saving and labor‑saving, the taps have quick‑change devices to install and remove tapping chucks. The product is easy to operate, the torsion type tapping chuck can prevent the tap from breaking. Strict quality control and quality assurance, high safety factor, can be used with peace of mind. Specification: Item Type: Tapping ColletMaterial: High speed steel Specification: M20 Shank Diameter x Square Hole: Approx. 15 x 12mm / 0.6 x 0.5in Product Category: CNC Tool System: Japanese standard Package List:1 x Tapping Collet Package List 1 x Tapping Collet