Machined with external marking points, these dowel centers are used for accurately aligning stock for proper dowel or tenon placement.Just drill one set of holes, slip in the dowel centers and press the joint together. The points on the dowel centers will precisely mark the hole locations on the other member.Surface Finishing: Chrome platingType: HollowMaterial: A3 steelcolor:SilverSize: 6 mm, 8 mm, 10 mm, 12 mmPackage Contents:2 * 6 mm wooden dowels2 * 8 mm wooden dowel2 * 10 mm wooden dowel2 * 12 mm wooden dowelOnly the above package content, other products are not included.Note: Light shooting 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.