Quick Details Warranty: N/A Customized support: OEM Place of Origin: China Type: Center Drill Bit Use: Metal Drilling, Making Holes Working Length (mm): 30mm Finish: Titanium plating Material: 4241 Product name: Step Drill Bit Set Usage: Drilling Holes Drill Bit Application: Drilling Holes Size: Size Table Shank: Round Shank Packing: Aluminum Case Name: Metal Hole Opener Advantage: High-efficiency  

Name	Step drill 5PC+center punch
Material	High-speed steel 4241
Size	Step drill 3/16-1/2''(3/16, 1/4, 5/16, 3/8, 7/16, 1/2)   Step drill 1/8-1/2'' (1/8,5/32.7/32.1/4,9/32,5/16,11/32,3/8,13/32,7/16,15/ 32,1/2mm)   Step drill 1/4-3/4'' (1/4, 5/16, 3/8, 7/16, 1/2, 9/16, 5/8, 11/16, 3/4)   Step drill 3/16-7/8'' (3/16, 1/4, 5/16, 3/8, 7/16, 1/2, 9/16, 5/8, 11/16, 3/ 4, 13/16, 7/8)   Step drill 1/4-1-3/8'' (1/4, 3/8, 1/2, 5/8, 3/4, 7/8, 1, 1-1/8, 1-1/ 4,1-3/8)
Box size	about 16*17*4CM
Weight	600g
Box Size	58*25*24cm, 40 sets/box

  product information: PC step drill straight flute aluminum box with center punch 3015 (1) 5PC step drill straight flute aluminum box with center punch 3235 Shank triangle round shank Material High-speed steel 4241: suitable for workpieces below 25°, such as carbon steel, iron plate, steel plate)  

• 1. Drills holes of various sizes without changing bits.
• 2. Minimal shocks and almost impossible to snap compared to conventional bits.
• 3. Smooth hole edges, perfect to drill holes for HVAC jobs.
• 4. Smoother and rounder holes.
• 5. Prevents metal scurf from flying around for improved safety.

  Convenient & Accurate Laser-engraved reference marks on each bit offer superb convenience and accuracy, ideal for drilling large and small-diameter holes in metal and plastic. For high-efficient drilling,thickness of sheet metal shall be less than that of each step. Universal Compatibility Compatible with 1/4,3/8,1/2electric drills or bench drills, but only work for Metal plate aluminum or plastic. Sleek & Accurate Drilling x-type openings design to facilitate the removal of cutting waste when drilling,preventing iron chips or sawdust scattering and ensuring sleek&accurate drilling.