Feature: 1. 6Pcs 1/4in hex 5-slot 90-degree countersunk bits, all of which have a 90-degree angle, and the cutting edges are hardened and polished to achieve sharpness. 2. A Chatter‑Free,five‑flute designed with staggered cutting teeth aranged to insure free chip flowing and rapid chatter free cutting. 3. 3Pointed countersink bit with hex wrench are made of high speed steel with good abrasion resistance and durable,includes 3mm, 4mm, 5mm, 6mm, 7mm, 8mm, 10mm for drilling pilot holes,the drill bit large chip flute and 5 edge chamfers allows faster and easier discharge of sawdust. 4. The 3/8in shank wood plug cutter drill bit set made of durable carbon steel material,used for tapered 1/4in, 3/8in, 1/2in ,5/8in wood plugs to cover recessed screw holes or hide blemishes,able to cut plugs to 22mm/23mm/25mm/26mm in length. 5. Perfect step drill bits suitable for drill holes in various material： within 3mm/0.12 in (iron plate, copper plate, aluminum plate); within 5mm/0.2 in (wood, PVC sheet, insulation boards). Not suitable for hard and brittle materials such as stainless steel, glass, tile floors, wall etc. Specification: Item Type: Woodworking Drilling SetMaterial: Alloy Application: Woodworking.Step Drill Bit Size: Approx. 10cm / 3.9inDual Head Magnetic Coil Screwdriver Bit Size: Approx. 13cm / 5.1in3-Point Countersunk Bit Size: Approx. 12cm / 4.7in Package List: 1 x 3mm 3-Point Countersunk Bit1 x 4mm 3-Point Countersunk Bit 1 x 5mm 3-Point Countersunk Bit 1 x 6mm 3-Point Countersunk Bit 1 x 7mm 3-Point Countersunk Bit 1 x 8mm 3-Point Countersunk Bit 1 x 10mm 3-Point Countersunk Bit 1 x 6mm Socket Type Cork Drill1 x 10mm Socket Type Cork Drill1 x 13mm Socket Type Cork Drill 1 x 16mm Socket Type Cork Drill 1 x 6mm Claw Cork Drill 1 x 10mm Claw Cork Drill 1 x 13mm Claw Cork Drill 1 x 16mm Claw Cork Drill1 x 6mm Diameter Chamfer 1 x 8mm Diameter Chamfer 1 x 9mm Diameter Chamfer 1 x 12mm Diameter Chamfer 1 x 16mm Diameter Chamfer 1 x 19mm Diameter Chamfer 1 x Dual Head Magnetic Coil Screwdriver Bit1 x Small Step Drill Bit1 x Medium Step Drill Bit1 x Big Step Drill Bit1 x Hex Wrench