Material: The dowel pins are made of steel for excellent marking performance on solid materials. So you can use it for hardwood as well as softwood. Durable: Wear-resistant, corrosion-resistant, necessary for carpentry, very easy to store and maintain. Method: Drill a set of holes, insert the dowel centers and press the joint. The dots on the dowel centers will precisely mark the hole locations on the other member. Diameter size: Available in four sizes, 6mm, 8mm, 10mm, 12mm. Note: The dowel pin is sharp, so keep it out of reach of children. Specification: Material: A3 Color: Silver Quantity: 12pcs/set Weight: 28g (4pcs) Diameter of cylindrical: 6mm, 8mm, 10mm, 12mm Package includes: 12 * Dowel Pin Note: Differences due to light and display, the color of the item is slightly different. Please allow 1-2cm differences due to manual measurement.