HUOEPU 5Pcs 3/8 in Cobalt Drill Bits, M35 HSS Metal Jobber-Length Twist Drill Bit Set with 135-Degree Point Design for Hard Metal Working

Features:&nbsp;<br> 5Pcs twist drill bits: 3/8in.<br> Premium material: crafted from industry-grade HSS high-speed steel with M35 cobalt, these drill bits are fully ground for enhanced durability and performance, providing superior hardness.<br> Black and gold polished treatment: the black and gold polished finish enhances lubricity and creates small pockets on the tool's surface to hold coolant near the cutting edge<br> 135-degree design: the 135-degree tip and twist design allows for easier drilling into harder material, reducing wear and tear compared to standard 118-degree bits. This ensures more efficient and precise hole drilling.<br> Spiral fluted design: when run in a counterclockwise direction (right-hand cut), spiral fluted tools evacuate chips up and out of the cut to reduce clogging.&nbsp;<br> Wide applications: the drill bits keep centered without a pilot hole. Ideal for drilling mild metal, steel and alloy, iron, cast iron, copper. These jobber drill bits have the rigidity and length for most applications of corded or cordless hand drills and drill presses. Straight shank allows wide compatibility. Can be used with hand and motorized tools including pin vises and chuck drills.<br> <br> Specification:&nbsp;<br> Product name: HSS Twist Drill Bits<br> Material: HSS(high speed steel)&nbsp;<br> Color: as picture shown&nbsp;<br> Size: 3/8in&nbsp;<br> Cutting angle string: 135 degree<br> Surface treatment: fully ground&nbsp;<br> Quantity: 5pcs&nbsp;

• Enhanced Cutting Edge Geometry - Features a 135-degree split point that requires less downward pressure and stays centered during operation, minimizing bit walking on curved surfaces.
• Premium Cobalt-Steel Composition - Contains M35 cobalt blend for increased red-hardness properties, retaining temper even when reaching elevated drilling temperatures.
• Specialized Surface Treatment Technology Treatment Technology - Black oxide coating provides added lubricity while reducing friction-induced heat buildup during extended use cycles.
• Versatile Material Compatibility - Effectively penetrates ferrous/non-ferrous metals including carbon steel, brass alloys, and cast iron workpieces.
• Balanced Jobber-Length Configuration - Maintains optimal stiffness-to-length ratio for improved accuracy in both portable drills and stationary press machines.