Micro Motor Drill Chuck Clamping Range 0.3-4mm Taper Mounted Mini 3.178mm KF
Material: High‑carbon steel. Taper: 2° 49′ 24.7″. Works with 0.3 mm–4 mm (0.01″–0.16″) drill. Maximum clamping: 4.2 mm. Strong impact resistance. High precision screw thread and tapered hole. High strength and hardness.