Details: *Machined with external marking points, used for accurately aligning stock for proper dowel or tenon placement *Dowel centers made of steel so you can use this for hard wood as well as soft wood *Just drill one set of holes, slip in the dowel centers and press the joint together *The points on the dowel centers precisely mark the hole locations on the other member Specification : *Tpye:solid/hollow *Color: Silver *Material: A3 *Surface Finishing: Chrome plating *Optional Size: 6mm, 8mm, 10mm, 12mm (Approx.) *Quantity:4pcs Use steps: 1. After the wood tenon is connected with the wood block, the round wood tenon tip is covered with the wood tenon 2. Align the tip of the head with another wood block to be tenoned 3. In this way, there is a mark of round head on the other wood block 4. Use a drill to drill the mark round head, and then two pieces of wood are perfectly combined without dislocation and tenon PackageIncludes: 4*Dowel Center Point Pins (6mm/8mm/10mm/12mm) Note: 1. The real color of the item may be slightly different from the pictures shown on website caused by many factors such as brightness of your monitor and light brightness. 2. Please allow slight manual measurement deviation for the data.