[SIZE] - 5mm (1/5 inch) dowel center, made of stainless steel for better corrosion resistance. [USAGE] - This dowel point is for marking hole positions accurately for doweling round stock and tenons, making two blocks join perfectly. [STRONG] - The sharp point on the dowel marker is strong and sharp enough to mark the hole locations on the other woodblock precisely. [APPLICATION] - Dowel point center is accurately marking drilling locations of two jointing boards. It is great for jobs that need precision. [NOTICE] - This Drill Center contains sharp cusp, please keep it properly.