Specification:  This 23-Pack Chamfer Drilling Kit Includes:  1. 6pcs 1/4" Hex Shank HSS 5 Flute 90 Degree Countersink Drill Bits + 7pcs Three Pointed High Speed Steel Countersink Drill Bit with 1 pc L-wrench + 8pcs 3/8" shank wood plug cutters set with 1pc Automatic center punch;     2. 7pcs 3- Pointed Countersink Drill Bit:  Made of high carbon steel with hiigh hardness and wear resistance, includes 3mm, 4mm, 5mm, 6mm, 7mm, 8mm, 10mm for drilling pilot holes,the drill bit large chip flute and five edge chamfers allows faster and easier discharge of sawdust. With the L-shape hex key provided, you could easily remove five bevel chamfer or adjust counter sleeve depth and drilling depth.    3. 8pcs 3/8" Shank Wood Plug Cutter Drill Bit:  Made of high carbon steel, used for tapered 1/4" ,3/8" ,1/2" ,5/8" wood plugs to cover recessed screw holes or hide blemishes,able to cut plugs to 22mm/23mm/25mm/26mm in length.    4. 6pcs 1/4" hex shank 5 flute countersink drill bit:  Made of high speed steels. There are 6 different sizes in diameter: 6mm(1/4"), 8mm(5/16"), 9mm(3/8"), 12mm(1/2"), 16mm(5/8"), 19mm(3/4") .Great for Sinking 90 Degree Holes into Wood and Soft Metals Countersunk Screws and Fixings.Suitable for DIY, Home and General Building/Engineering Using.     Package Included:  23Pcs x Drill Bit Set