EFFICERE 8-Piece 1/2 Reduced Shank Silver and Deming Drill Bit Set

In this review the EFFICERE 8-piece Silver and Deming drill bit set is evaluated for tradespeople and hobbyists who need reliable large-diameter bits from 9/16 in to 1 in. The bottom line: this set is best for drilling large holes in wood, plastics and softer metals because of its M2 cobalt high speed steel construction and 135-degree split point that reduces walking and speeds cutting. The included aluminum carry case keeps the bits organized, making the set a practical pick for workshop tasks and on-site jobs where size coverage and durability matter.

Key Features

• M2 cobalt high speed steel: Provides industrial-grade strength for repeated use and good wear resistance across wood, plastic and many metals.
• 135-degree split point: Self-centers on contact to reduce walking and allow faster, more accurate starts without pilot holes.
• Dual coating finish: Gold titanium and black nitride layers hold lubricant better for smoother drilling and improved corrosion resistance.
• 1/2 in reduced shank with tri-flatted end: Fits most drill presses and power tools while the tri-flatted shank locks more securely in a 3-jaw chuck to prevent slippage.
• Deep spiral flute design: Clears chips quickly to maintain cutting efficiency on larger diameters and extended drilling runs.
• Aluminum storage case: Heavy duty case organizes the full-size set of eight large bits for transport and long-term storage.

Who It's For

The set is ideal for woodworkers, metal fabricators working on softer metals like aluminum and copper, and mechanics or hobbyists who frequently drill large holes from 9/16 in up to 1 in. The combination of a reduced shank and tri-flat end makes these bits convenient for use in drill presses and many hand-held drills that accept a 1/2 in shank.

Those who primarily drill hardened steel or need precision long-life performance in high-heat industrial machining should look elsewhere or use purpose-specific cobalt or carbide bits; some users report mixed durability on the largest sizes under heavy steel work. For general shop, automotive and woodworking tasks this set offers wide size coverage and good value.

Pros & Cons

Pros

• Wide range of large SAE sizes covers common needs from 9/16 in to 1 in without gaps.
• Split point and deep flutes reduce walking and evacuate chips for faster drilling.
• Durable dual coating improves lubricant retention and corrosion resistance.
• Aluminum case offers secure storage and portability.

Cons

• Durability and edge retention vary by user; some report dulling or breakage under heavy use in harder steels.

Specifications

Brand	EFFICERE
Material	M2 cobalt high speed steel
Tip geometry	135-degree split point
Coating	Gold titanium and black nitride dual coating
Shank	1/2 in reduced shank with tri-flatted end
Sizes included	9/16 in, 5/8 in, 11/16 in, 3/4 in, 13/16 in, 7/8 in, 15/16 in, 1 in
Storage	Heavy duty aluminum carry case

Our Verdict

For anyone who needs dependable large-diameter bits for woodworking, sheet metal, aluminum, copper and general workshop use, this set is a sensible purchase because of its size coverage, M2 high speed steel construction and anti-walk tip. It represents good value when used for its strengths, but buyers who frequently cut hardened steel should consider more specialized bits for prolonged life.

Frequently Asked Questions

Are these bits suitable for drill presses?
Yes. The 1/2 in reduced shank and tri-flatted end make them compatible with drill presses and many hand-held drill chucks.

Can these drill stainless steel?
They will drill softer stainless and thinner mild steel, but heavy or prolonged stainless work may blunt the edges; for demanding steel tasks consider dedicated hardened or cobalt-forged variants.

Does the coating improve life?
The gold titanium and black nitride dual coating helps retain lubricant and increase corrosion resistance, which improves performance and life in typical workshop applications.