SALI Cobalt Drill Bit Set, 10Pcs 5/16" M35 High Speed Steel Jobber Length Drill Bit Kit for Hardened Metal, Stainless Steel, Cast Iron, Wood and Plastic, with Index Storage Case

Size and material:Each metal drill bit has a diameter of 7/16 inch and is made of cobalt M35 high-speed steel (hss), which has superior toughness and durability
Durability and applicable scenarios:High speed steel improves the surface hardness and wear resistance of drill bits, allowing them to easily penetrate sturdy materials and have a longer service life. Suitable for various scenarios such as metal, wood, plastic, aluminum alloy, etc
Withstand heavy blows and quick replacements:The 1/4 inch hexagonal shank design allows the drill bit to withstand high torque transmission and heavy pressure. In addition, the drill bit is equipped with a quick replacement design, which facilitates the quick replacement of cutting tools
Quick drilling:The specially designed 135 degree segmentation point prevents the drill bit from moving during contact, making it easy to start drilling. The precise parabolic groove shape helps with rapid chip removal, reducing friction and heat accumulation. Its sharp cutting edges make it easy to cut on wood and metal
Work efficiency:Combining high speed and durability, it is favored by electricians, plumbing workers, professionals. Suitable for soft metals such as metal, wood, thin wooden boards, aluminum, copper, etc., as well as for home diy, general construction, and home engineering projects