DRILL CHUCK HOLDER/APU Precision :0.02mm Balance:8000rpm ... 2.The shank and keyless drill chuck are combined together so that to avoid the drill chuck slipping out for heavy- duty ... cutting 3. Each APU drill chuck attached 1pc APU wrench.4.Applied for end mill,drill bits,drill reamers taps and can ... tools5.We have various models of good clamping APU drill chuck holder,BT30 BT40 BT50-APU, and more detail ...