Cheap And Discounts diameter 40mm CNC Knurling Sliding Table Screw Rod Knob Crank 10mm Rotating Handle Embossed Stepper Motor Positioning Hand Wheel Wholesale. Buy Directly From Merchant Chuilian Tests Hand tools Store. Enjoy ✓Free Shipping Worldwide! ✓90 Days Buyer Protection. ✓Easy Return. ✓Money Back Guarantee.