Both the outer support and the inner clip can be used, safe and stable. Aluminum alloy large flat claw, suitable for wooden spinning bowls, plates and other items with specially designed large diameter clamping jaws, clamping range of 5-23 centimeters, standard with 8 fixed silicone wrapped screws, clamping without damaging the workpiece. The of the disc has undergone oxidation treatment, which has advantages such as corrosion resistance and wear resistance. This aluminum alloy flat claw is only suitable for ordinary chucks. Quick change chucks require the purchase of a transition module. Please note: the physical slightly color difference or difference, does not affect the use, please do not mind, thank you! Colour:B:Silver-Gray Material:Aluminum alloy Size:Diameter:Inner clip:48x238mm, Outer support:83-276mm Package Contents: 1 * Wood Turning Lathe Chuck Set Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.