Features. Firm. The sturdy plate seat can fix the workpiece on the worktable to avoid errors caused by machine vibration. Rotating. Can be rotated 360 degrees meeting your different angle needs. Superior material. Made of aluminum alloy of high quality with good resistance to corrosion and a long service life. Exquisite workmanship. Processed by exquisite workmanship so that the surface is smooth and has no scratches. Wide applications. Can be used to clamp various types of electric drills polishing machines and other machines. Specifications. Material: aluminum alloy. Color: silver. Desktop thickness that can be clamped: 55mm/2.16inch. Fixed diameter: 38mm/1.49inch. Item size: 27.8*9.4*6cm/10.93*3.69*2.36inch(L*W*H). Weight: 500g/17.64oz.