[CNC Aluminum Alloy Material] This dowel maker jig kit is made of premium CNC aluminum alloy material, and the is anodized, rust-proof and to use. [Round Carbide Blades] With indexable round carbide blades, it is sharp and provides smoother cutting experience. The carbide blade is designed for making this dowel maker dowel board more effective in making round wooden sticks. [Inch and 8 Holes] It has inch, 8 holes of different diameters (5/16, 3/8, 7/16, 1/2, 9/16, 5/8, 11/16, 3/4 inch), can meet different work needs. The attached blade can also be used in interchangeable positions, convenient and fast. [Simple to Use] Just loosen the screw, rotate the red cutter holder to the desired diameter, re-tighten the screw and craft in no time, easy to use. Please note: the physical slightly color difference or difference, does not affect the use, please do not mind, thank you! Product Name: Electric Drill Rod Auxiliary Tool Colour:Black Material:Aluminum alloy type: B Package Contents: 1 x Adjustable Dowel Making Jig 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.