KKmoon 4pcs/set 1/4" Shank Titanium Barrel Cork Drill Plug Cutter Drill Bit Bored Hole Wood Tenon Drill Hole Saw Arbors Handy Woodworking Tool 6mm 8mm 13mm 16mm Brand new and durable for daily use. Handy tool with decent quality and price. Includes 4 sizes(6mm, 8mm, 13mm, 16mm) in one plug cutting set. Can be used with bench drill, hand drill and other professional equipments. High carbon steel with titanium plating in surface, good looking and rustproof. Very helpful for wood plug cutting, dowel maker, make countersink bored holes.