High Quality Dowel Centers are made of steel for excellent marking performance on solid materials. So you can use it for both hardwood and softwood. Common Features These dowel centers allow you to line up dowel holes in drilled parts to accurately mark the location of the dowel. drill into the jointing material. Method Just drill a set of holes, insert the centers of the studs and press the joint together. The dots on the stud centers will precisely mark the hole locations on the other member. Protection Mark surface protection Precisely mark the location of existing stud holes or pins in the second board to be assembled< br/> Available in four sizes 6mm, 8mm, 10mm, 12mm, each size contains two stud centers. There are solid and hollow stud centers, and you can choose the ones you need. Features: Material: A3 Steel Surface Finish: Chrome plating Type: solid, hollow (optional) Quantity: 2 pcs each size Note: The data is all manual measurement, please allow 1-3cm error, due to the light and display difference, there will be some difference in color, depending on the physical object received Delivery Quantity: (according to the main image)