SEDIANAS Cobalt Drill Bit Set 15Pcs M35 HSS Twist Bits – 1/16 to 3/8 in with Case

Overview

The SEDIANAS Cobalt Drill Bit Set brings together precision, durability, and versatility for metal, wood, and plastic work. Crafted from M35 cobalt high speed steel, these bits are designed to resist heat and stay sharp during long drilling sessions, helping you complete tasks with confidence in your tool setup.

Whether you’re upgrading a workshop or tackling occasional projects, this 15 piece set is built to perform in demanding environments. The combination of a robust cobalt alloy and a practical storage solution makes it a reliable companion for professional garages, maker spaces, and home workshops alike.

Key benefits at a glance

• M35 cobalt steel offers superior heat resistance and increased hardness for longer bit life in hard materials.
• 135 degree split point design helps keep the bit centered on entry, reducing walk-off and enabling faster starting holes.
• Fully ground twist design promotes efficient chip clearance, lowering friction and helping maintain cooler drilling temperatures.
• 15 piece range covers a broad set of common sizes from 1/16 to 3/8 inch, with multiple bits in some sizes for versatility.
• Suitable for tough materials including hardened metals, stainless steel, cast iron, high temperature alloys, and hard plastics or wood.
• Organized storage case with a size index keeps tools easy to locate and transport.

What you can drill

These cobalt bits are designed to handle a variety of materials. Expect solid performance when drilling stainless steel, cast iron, and hard plastics, as well as softer woods when a precise hole is needed. The combination of heat resistance and edge retention supports repeated drilling without obvious dulling under typical usage conditions.

Design and practical workflow

• Straight shank provides broad compatibility with most drill chucks for quick setup.
• Efficient chip clearance helps reduce heat buildup and keeps cutting paths clean for smoother operation.
• Compact holder with a built in size index consolidates all bits into one portable package.

While these bits are engineered for durability and precision, outcomes depend on material, drill speed, and user technique. This set is a practical enhancement for projects that demand reliable performance across metal, plastic, and wood tasks, without making guarantees about results. Consider it a versatile option for advancing projects with consistent tools you can trust in a busy shop or on site.