Electric Drilling Machine for Milling Round Pins Auxiliary Tool for Decoration Workers Description: [Holes from 8mm to 20mm] Adjustable round stud drilling auxiliary tool with 8 different holes 8mm, 9mm, 10mm, 12mm, 15mm, 16mm, 18mm and 20mm to meet different working needs [Aluminum Alloy] Electric Drilling Machine for Milling Studs Round Rod Auxiliary Tool is made of aluminum alloy, precision CNC machining [With Carbide Blade] Carbide Round Insert Stud Making Instrument, Durable and Easy to Use [Easy to operate] simply turn the red tool holder to the gear of the desired diameter, then tighten the screws to create round wooden strips of the appropriate diameters [Auxiliary tool for round bars for woodworking suitable for recessed and spigot construction enthusiasts, woodworking workers, engineers, carpenters Size Chart: 8,5 cm x 8 cm/3,35 inch x 3,15 inch The package includes: 1 stud making tool