Description Material: Centering dowels 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 centers of the studs and press the joint. The dots on the stud centers will precisely mark the hole locations on the other member. Diameter size: Available in four sizes, 6mm, 8mm, 10mm, 12mm. Note: the center point pin is sharp, so keep it out of the reach of children. Specification: Material: A3 Color: Silver Quantity: 12 pieces/set Weight: 28g (4 pieces) Diameter of cylinder: 6 mm, 8 mm, 10 mm, 12 mm Package includes: 12 * point centering Note: Differences due to light and display, the items color is slightly different. Please allow 1-2cm deviations due to manual measurement.