SHANGHAI EASYDRILL INDUSTRIAL CO., LTD.  

Product Name: 3PCS Tin-Coated HSS Step Drill Bits with Hex Shank (JL-HSHT) Model NO.: JL-HSHT Material: High Speed Steel Type: Center Drill Bits,Core Drill Bits Customized: Customized Set: 3PCS/Set Surface: Tin-Coated Shank: 1/4" Quick Change Hex Shank Min Qty: 200sets Trademark: JOYLIGHT Transport Package: PVC Bag, Wood Box, Blister Card, Plastic Box etc Specification: hex shank Origin: China HS Code: 820750900 Product Description Hex Shank HSS Step Drills with Tin Coated (JL-HSHT)1. Material: HSS M22. Thermal treatment: Bit part 62-65HRCBit shank 40-50HRC3. Surface treatment: bright white,Black Oxide, Titanium Coated, Cobalt Coated, TiALN Coated(The surface of the drill bit without tipping blunt crack significant bump and grinding burn and influence the use performance defect, Product no surface rupture, burr, rust, black spots or other undesirable phenomenon)4. Shank:hex shank. All shank with 1/4" quick change hex shank or 3/8" quick change hex shank prevents slipping in drill chuck or bit extension.5. Flute type: straight flute6. for drilling cylindrical holes in solid material up to a thickness of 1/8".7.Burr-free and vibration-free drilling.8.The tapered cutting edges of the next drill step can be used for simultaneous deburring or chamfering of the finished bore at the same time.9.Drilling perfectly round holes in steel, brass, copper, aluminum, wood and plastic.10.Drills up to 1/2" holes sizes with one bit.11.Ideal tool for sheet metal workers, electrical contractor, auto mechanics, and general contractors. SizeStep QtyShank Dia3/16" - 1/2"61/4"3/16" - 1/2" Long61/4"1/8" - 1/2"131/4"1/4" - 3/4"91/4" or 3/8"3/16" - 7/8"121/4" or 3/8"1/4" - 7/8"111/4" or 3/8"1/4" - 1"101/4" or 3/8"9/16" - 1"81/4" or 3/8"1/2" - 1"91/4" or 3/8"7/16" - 1 1/8"121/4" or 3/8"1/4" - 1 3/8"101/4" or 3/8"1/4" - 1 1/2"111/4" or 3/8"13/16" - 1 3/8"101/4" or 3/8"3/4" - 1 3/8"111/4" or 3/8"7/8" - 1 1/8"21/4" or 3/8"7/8" - 1 3/8"51/4" or 3/8"