Feature: 1. The product possess good clamping strength, high accuracy and long service life 2. Safe and fast replacement of tapping chuck, can be connected to drill chuck extension 3. Realize install and disassembly of tapping chucks, taps have quick‑change devices, saving time and effort, possess simple operation 4. Torsion type tapping chuck can prevent tap from breaking, very durable 5. Adopt excellent high‑speed steel material, widely used as CNC tool Specification: Item Type: Tapping Collet Material: High speed steel Specification: M16 Shank Diameter x Square Hole: Approx. 12.5 x 10mm / 0.5 x 0.4in Product Category: CNC Tool System: Chinese standard How to Use: 1. Press the knurled position of the handle body with the thumb of your left hand and pull it in the direction of the arrow 2. The handle body is aligned with the concave and convex keys of the chuck, install the chuck into the shank body 3. When disassembling the chuck, pinch the knurled key with your hand and pull the chuck back and it will be ejected automatically Install Steps: 1. Thumbs press down the spring 2. Put the tap into the chuck hole and release your thumb. Package List: 1 x Tapping Collet