3Pcs/set 3-12 4-12 4-20 4-32mm HSS Straight Groove Step Drill Bit Titanium Coated Wood Metal Hole Cutter Core Drilling Tools Set

Features 100% Brand new! Premium HSS material. High-speed steel combined with a titanium coating to reduce friction and heat. Performs well in heat, corrosion, and rust resistance. Widely used. Perfect Hss step drill bits suitable for drill holes in various material: within 3mm/0.12" (iron plate, copper plate, aluminum plate, etc); within 5mm/0.2" (wood, PVC sheet, insulation boards, etc). Not suitable for hard and brittle materials such as stainless steel, glass, tile floors, walls etc. Easy drilling. Two-flute design, clears chips faster, smooth cutting. High step design let you feel the stop and never drill bigger in mistake. Quick change 1/4-inch hex shank makes for easy, convenient bit switches and is compatible with impact ready power tools. The cone drill bits set is durable and strong enough to punch and drill clean holes and can also help to enlarge existing holes and clean edges. Suitable for home DIY, and general building/engineering use. Specifications Material: HSS(High Speed Steel) Finish Type: Titanium Shank Diameter: 1/4" Hex shank Color: Gold+silver Size: Approx. 3-12mm Full length: 78mm/3.1", Cutting blades 53mm/2.1" 4-12mm Full length: 66mm/2.6", Cutting blades 40mm/1.6" 4-20mm Full length: 75mm/3.0", Cutting blades 50mm/2.0" 4-32mm Full length: 102mm/4.0", Cutting blades 78mm/3.1" 3-12mm 10 Steps (Cutting diameter 3, 4, 5, 6, 7, 8, 9, 10, 11, 12mm) 4-12mm 5 Steps (Cutting diameter 4, 6, 8, 10, 12mm) 4-20mm 9 Steps (Cutting diameter 4, 6, 8, 10, 12, 14, 16, 18, 20mm) 4-32mm 15 Steps (Cutting diameter 4, 6, 8, 10, 12, 14, 16, 18, 20, 22, 24, 26, 28, 30, 32mm) Attentions Please allow tiny size deviations due to human measurement. Due to the effect of light and monitor's brightness, there may be slight differences between the color tone of the photo and the actual item! Suitable for workpieces with hardness below 25°. Package Included 1 x 3-12mm Drill Bit 1 x 4-12mm Drill Bit 1 x 4-20mm Drill Bit 1 x Storage Pouch Or 1 x 4-12mm Drill Bit 1 x 4-20mm Drill Bit 1 x 4-32mm Drill Bit 1 x Storage Pouch