EFFICERE 17-Piece Large Diameter Drill Bit Set – M2 HSS, 135° Split Point, 1/2 to 1 Inch Range

Boost your drilling projects with the EFFICERE 17-Piece Large Diameter Drill Bit Set

Designed for large-diameter holes, this kit covers sizes from 1/2 inch to 1 inch, all in one robust aluminum case. Built from premium M2 cobalt high speed steel, these bits deliver dependable strength when working across wood, plastic, and metal surfaces.

The 135-degree split point starts cutting with self-centering action, reducing wandering and speeding startup. The twist blade features a deep groove that clears chips and particles quickly, helping you maintain a smooth, steady feed.

Coating matters: each bit sports a gold titanium and black nitride dual finish. This combo helps retain lubricant, lowers wear, and offers improved corrosion resistance compared with standard finishes, making them suitable for heavy-duty applications.

Practical design details matter for real-world use. The 1/2 inch reduced shank fits most drill presses and power tools, while the tri-flat shank end locks into a 3-jaw chuck, reducing slippage during operation. A handy aluminum case keeps the 17 pieces organized in your toolbox or on the job site.

What you can drill with confidence

• Wood, plastic, aluminum, copper, cast iron, mild steel, stainless steel, and sheet metal
• Large-diameter holes from 1/2 inch to 1 inch, with clean starts and minimal wandering

Real-world benefits

• Fast, efficient drilling thanks to the split-point geometry and deep-chip clearance
• Durable coating that resists wear and corrosion in tough environments
• Secure chuck fit with reduced shank and tri-flat end for reliable operation

Note: actual results depend on material, drill speed, feed rate, and proper tool setup. This set is designed to complement professional workflows in woodworking, auto repair, equipment maintenance, and metal fabrication.