Specifications:Material: Stainless steelBottom Diameter: 6mm, 8mm, 10mm, 12mmQuantity: 8pcs(each size comes with 2 pieces)Weight: Approx. 34~57g Package Includes:8 * Dowel Centers Note: Please allow small size error due to manual measurement. Thanks for your understanding. Features Material:This dowel drill is made of iron with chrome-plated surface, high hardness, rust-proof and long service life. Package:There are solid dowel centers and hollow dowel centers selectable, available in 4 different sizes, available in 4 different sizes, which are 6mm, 8mm, 10mm, 12mm, can meet multiple purposes. Advantage:This product is durable, wear-resistant, corrosion-resistant and can be used to locate two wood joint holes to make a perfect connection between two wood blocks. Easy to use:You just need to drill a series of holes, insert the positioning centralizers of the pin and press another wooden panel on the joint. The positioner points will precisely mark the positions of the holes on the other side. Application:This product can be used to install closets, cabinets, tables, beds, bookshelves, etc. It is a must-have tool for those who use wood.