● Adopting high quality tungsten steel and fiber reinforced composite material, high hardness, durable in use.

● Beautiful and practical surface concave and convex design, so that the front and rear jackets can effectively cooperate and reduce the jacket shaking.

● Jaws special treatment, with good abrasion resistance.

● Keyless chuck finger-tightens for easy changes.

● Accuracy is accurate and reliable.

● Application: Impact drill or AC/DC electrical drill.