Hazet 849IG-8 Collet Chuck for secure and accurate clamping. Designed for use with a variety of tools and accessories. High-quality steel construction for durability and strength. Provides excellent grip and minimizes tool slippage. Quick and easy collet changes for efficient operation. Ideal for use in automotive, mechanical and industrial settings. Compatible with standard collets and accessories. Precision-engineered to ensure minimal runout and vibration. Ergonomic design for ease of handling and operation. Outside hexagon 8 =5/16-inch, for taps - 849 IG-M 8 to M 12 - (in conjunction with adapter 2250-3).