Multiple Sizes:You can receive 20 pieces solid dowel and tenon center pins in the package, includes 4 different diameter sizes: 1/4", 5/16", 3/8", 1/2"(6/8/10/12mm), each size contains 5 dowel center pinsThe dowel center. Quality material:Our dowel pin center point made of steel, durable, wear-resistant, corrosion-resistant, which can be applied for a long time, will not break or be damaged during use. How to Use:Use a drill to drill a hole in the clipped scrap, put the pin into the hole, slide into the center of the pin and press the joint together First install the dowel centering pin into the hole, then press the other part on top of the dowel, Hit with a hammer to mark exactly where to drill the other part. Wide application:These dowel points allow you to precisely transfer the location of one set of dowel holes, the points on the dowel centers will precisely mark the hole locations on the other member, make it easy to install the pins. Woodworking Tools:Very practical woodworking drilling positioning tool, ideal for beginners. Various sizes can meet your multiple purposes in woodworking, can apply to accurate alignment of drill holes when doing dowel pin joinery.