Features:* 16 pcs. Wall Plug & Spigot Center Point Pin Wood 6mm/8mm/10mm/13mm Center Kit * Machined with external marking points, used to accurately align stock for correct placement of studs or tenons * Wall plugs made of steel so you can use it on hardwood and softwood * Sturdy wall plugs and you can choose the ones you need* Just drill one set of holes, insert the dowel centers and press the joint together* Points on the dowel centers accurately mark the locations of the holes on the second pieceSpecifications:* Material: A3 steel* Surface finish: chrome plating* Type: fixed* Size: 6mm, 8mm, 10mm, 13mm(Approx.). Package Contents: 16pcs/set pin centersNote: The actual colors 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.