Features:- This set includes 4 standard plug cutters and 4 four-tooth chamfered cutters.- Chamfered Cutters Make Tapered plugs To Fill Countersunk Holes.- Use Standard Cutters To Eliminate Imperfections In Wood.- 8 Piece Plug Cutter set Makes perfect plugs for counter-bored holes.- The Cutter set Achieves excellent finish when using same timber.Specification:Material: 45#Carbon Steel.Shank features: Round shank.Size: 5/8"(wood plug 15.8mm).1/2"(wood plug 12.7mm).3/8"(wood plug 9.5mm).1/4"(wood plug 6.3mm).Uses: Suitable for bench drill Round shank. Package Included:1 x 8 Pcs Wood plug cutter Drills