4 Sizes A total of 16 pieces: The package contains 4 different sizes of centering pins, 4 pieces per size: 6 mm 8 mm 10 mm 12 mm, the essential dimensions ensure the different installations of furniture or art objects. Material: The dowel pin is made of steel and has good solid marking properties, so you can use it on hardwoods and cork. High quality stainless steel material, easy to store and maintain General functions: With these dowel centers, you can align the dowel holes in the drilled parts to accurately mark the drilling position in the counterpart. Processed with external marking points. Convenient and practical: First drill the wooden board and align the center with the other wooden block. Then the other wooden block has the center point mark, and the mark is punched with a drill, and the last two pieces of wood are combined accurately and without offset. Wide Uses: Our wood alignment tool, which is used for the installation of cabinet, wardrobe, table, bed, bookcase, etc.