Hymnorq 5-Piece 5/16" M35 Cobalt Drill Bit Set for Hard Metal, 5% Cobalt Twist Drill Bits for Stainless Steel & Cast Iron, 135° Split Point, Straight Shank with Bronze Finish & Transparent PP Case

Hymnorq 5-Piece 5/16" M35 Cobalt Drill Bit Set for Hard Metal, 5% Cobalt Twist Drill Bits for Stainless Steel & Cast Iron, 135° Split Point, Straight Shank with Bronze Finish & Transparent PP Case

• [PREMIUM M35 COBALT STEEL] Crafted from M35 grade high-speed steel with 5% cobalt, these drill bits offer superior heat resistance and exceptional durability. They are perfectly engineered to power through the toughest materials, including heavy-duty stainless steel and cast iron.
• [135° PRECISION CUTTING] Features a 135-degree split point that ensures fast, pinpoint-accurate starts while eliminating frustrating walking or skating. The dual twist flute design significantly enhances chip and debris removal for a remarkably smooth and fast drilling experience.
• [ROBUST DESIGN & DIMENSIONS] The fully ground construction features a straight shank with a specially chamfered end, ensuring highly secure chuck engagement and optimal torque transfer without slipping. Dimensions: 3.28" working length and 4.5" total length.
• [FRICTION-REDUCING BRONZE FINISH] Coated with a sleek bronze hue finish that does more than look professional—it actively reduces drilling friction and heat build-up, significantly extending the overall lifespan and sharpness of your tool.
• [CONVENIENT & TOUGH STORAGE] Your 5-piece 5/16-inch drill bit set arrives neatly packaged in a tough, transparent PP (polypropylene) storage case. This keeps your essential bits meticulously organized, safely protected from moisture and drops, and exceptionally easy to transport to any job site.