characteristic Including 16mm 18.5mm 20mm 25mm 30mm, 25 mm, 30 mm, a total of 5 woodworking openers with different specifications, to meet the . Can be used for hand drill, bench drill and magnetic drill equipment. The reamer has been upgraded to a more M35 cobalt-containing high-speed steel high-precision lathe to grind the tooth edge. High-precision lathe grinding edge tooth opening resistance is small and speed is fast describe Name: woodworking hole opener set Material: high speed steel Quantity: 5pcs/set color:as shown packaging design is easy to store and carry Package Contents: 1 x Woodworking hole opener 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.