Features Three-jaw drill chuck is more stable and not easy to fall off. M10 shaft sleeve can withstand more torsion. The synchronous wheel is locked tightly to lock the sliding block position. Double flange bearings runs more smoothly. High accuracy,works more fluently and more stable. Specification:Item Type:Unpowered Spindle Drill Chuck: JTO Clamping Range: 0.3~4mm Bushing: M10 Connecting Rod: M10 Accuracy: 0.005mm Matching Bearing: F6800Z Synchronous Wheel: XL20 Tooth Package List:1 x Drill Chuck1 x Drill Chuck Key2 x Bearing1 x Black Washer1 x Slide Block1 x Synchronizing Wheel2 x Hex Wrench1 x Connecting Rod2 x Large Wrench1 x Black Screw1 x Shaft Sleeve(2 x Chuck Sheet / 1 x Sleeve) Package List 1 x Drill Chuck 1 x Drill Chuck Key 2 x Bearing 1 x Black Washer 1 x Slide Block 1 x Synchronizing Wheel 2 x Hex Wrench 1 x Connecting Rod 2 x Large Wrench 1 x Black Screw 1 x Shaft Sleeve(2 x Chuck Sheet / 1 x Sleeve)