4 sizes total 16 pieces: the package includes 4 different sizes of centre point pins, 4 pieces per size: 6 mm 8 mm 10 mm 12 mm, the essential sizes ensure the different installation of furniture or art objects. Material:The dowel pin is made of steel and has good solid marking properties, so you can use it for hardwoods and cork. High-quality stainless steel material, easy to store and maintain General functions: with these dowel centres you can align dowel holes in the drilled parts to accurately mark the drilling position in the counterpart. Finished with external marker dots. Practical and practical: first drill the wooden board and align the middle on the other wooden block. Then the other wooden block has the mark of the centre, and the marking is punched with a drill and the last two pieces of wood are combined precisely and without offset. Wide use: our alignment tool for woodworking which is used for installing wardrobe, cabinet, table, bed, bookshelf, etc. Suitable for anyone who works with wood or wood crafts.