EFFICERE 17-Piece 1/2 Reduced Shank Silver and Deming Drill Bit Set

In this review the EFFICERE 17-piece silver and Deming drill bit set is examined for users who need reliable large-diameter bits for woodworking, metal fabrication, and equipment repair. The bottom line: this set is best for craftsmen and hobbyists who regularly drill holes from 1/2 in up to 1 in and want a durable, well-organized kit. The standout reason to buy is the industrial M2 high speed steel construction combined with a 135-degree split point that improves centering and reduces walking when starting larger holes.

Key Features

• M2 Cobalt High Speed Steel: Provides industrial-grade strength to tackle wood, plastic, aluminum, copper, cast iron, mild steel and sheet metal with dependable durability.
• 135-Degree Split Point: Self-centers at the tip so drilling starts faster and bits are less likely to walk or wobble on contact.
• Deep Groove Twist Blade: Chip clearance is faster so cutting remains efficient during long runs and heavy cuts.
• Dual Coating Finish: Gold titanium and black nitride coating holds lubricant better and boosts corrosion resistance for longer tool life.
• 1/2 in Reduced Shank with Tri-flatted End: Fits drill presses and most power drills while the tri-flatted shank reduces slippage in 3-jaw chucks.
• Complete Large Sizes in a Case: Seventeen sizes from 1/2 in to 1 in are organized in a heavy duty aluminum case for easy transport and storage.

Who It's For

The set is ideal for woodworkers, metal fabricators, maintenance technicians and hobbyists who need a full range of large-diameter drill bits for projects that require clean, accurate holes from 1/2 in up to 1 in. It works well in both shop and jobsite use where larger holes in mixed materials are common.

Those who primarily drill very small holes, need carbide tips for high-volume stainless steel work, or expect flawless long-term edge retention under extreme industrial production should look elsewhere or consider specialized bit types designed for those narrow use cases.

Pros & Cons

Pros

• Industrial M2 HSS construction and dual coating give strong wear resistance and improved corrosion protection.
• 135-degree split point and tri-flatted reduced shank improve starting accuracy and reduce slippage in most chucks.
• Complete range of large Deming sizes and a sturdy aluminum case make this a practical kit for larger hole work.

Cons

• Some users report mixed durability and edge retention over extended heavy use, so high-volume metal work may show wear sooner.
• Not intended as a carbide substitute for drilling very hard steels at production volumes.

Specifications

Our Verdict

The EFFICERE 17-piece Deming drill bit set is a smart buy for anyone who needs reliable, large-diameter twist bits in a durable kit. It balances industrial-grade M2 HSS construction, a self-centering 135-degree tip and dual coating for smoother drilling and longer life, making it good value for general shop and jobsite use; those needing extreme production durability or carbide performance should consider more specialized options.

Frequently Asked Questions

Can these bits drill stainless steel?
Yes, the M2 HSS construction can drill stainless steel and other metals, though heavy production in very hard alloys may shorten edge life.

Will the 1/2 in reduced shank fit in a standard drill press?
Yes, the reduced shank is compatible with drill presses and most power drills, and the tri-flatted end reduces slippage in 3-jaw chucks.

Are all large sizes included?
Yes, the set includes 17 large Deming sizes from 1/2 in through 1 in in 1/32 in increments, stored in a heavy duty aluminum case.