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premium hss spiral grooved step drill bit set - 3 pieces 4mm to 12mm/20mm/32mm for efficient woodworking and metal drilling, with hole cutter bit for precision results logo

Premium HSS Spiral Grooved Step Drill Bit Set - 3 Pieces 4Mm To 12Mm/20Mm/32Mm For Efficient Woodworking And Metal Drilling, With Hole Cutter Bit For Precision Results Review

6

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Average

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$$
Revainrating 3.5 out of 5  
Rating 
3.4
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Details

MaterialHigh Speed Steel
Finish TypeNitride,Titanium
Shank TypeHex
BrandYangoutool
Tool Flute TypeSpiral

Description of Premium HSS Spiral Grooved Step Drill Bit Set - 3 Pieces 4Mm To 12Mm/20Mm/32Mm For Efficient Woodworking And Metal Drilling, With Hole Cutter Bit For Precision Results

【Improved Design:】1/4" Hex shaft drives are suitable for all kinds of power drills.And suitable for Woodworking Punching Tools. 【Durable Quality :】They are more durable and not easily broken compared with the ordinary twist drill bits. 【Set Includes:】3Pcs spiral step drill bits, 4-12/4-20/4-32mm 29Sizes,main material high speed steel, titanium coated high quality step drill bits. 【Wide Application:】Perfect for home repairs and light jobs such as drilling holes in plastic, aluminum, copper, iron sheet and many other types of sheet metal (excluding steel or any other harder metal. 【After Sales Warranty:】Our Worry-Free 12 Months Warranty and Toll-Free Tech Support, and friendly customer service.

Reviews

Global ratings 6
  • 5
    2
  • 4
    1
  • 3
    1
  • 2
    1
  • 1
    1

Type of review

Revainrating 5 out of 5

Perfect for Boat aluminum

For my application (aluminum) it was what i needed no rough hole on the front may have to slightly hit the back side though

Pros
  • Got the job done. It seem to stall out not sure if battery from drill issue or sharpness of bit
Cons
  • Difficulty Correcting Mistakes

Revainrating 5 out of 5

Can be adjustable! for my opinion

Was able to secure a small Ty-rap on one step to limit the hole size.Used on long PVC trim for about a hundred holes m, which also needed a semi-tapered hole to hold stemware.

Pros
  • Had to enlarge some 1/2 inch holes and it worked great. No more sanding and filing.
Cons
  • The bits are prone to breaking or chipping, reducing their durability and lifespan

Revainrating 1 out of 5

No Good At all - Total Garbage

So, I am using them to drill holes in Plastic Cases. The big one, which has the size I needed. Literally less than one dozen holes and the bit would not cut Hot butter on the sun. Total Garbage.The edge is completely dull on it. Why? PLASTIC, ABS PLASTIC.

Pros
  • Great value and works perfect.
Cons
  • Product good a little to thin..

Revainrating 4 out of 5

Good bit for the money.

The bit was what I was looking for. I've used it to drill out 10 holes so far in 1/8" steel tubing. It worked great. My only knock is that on the shaft, there were supposed to be 3 flat sides for the drill chuck to squeeze down on; well all 3 of these areas were barely flattened, still slightly beveled. This allowed the but to continually come loose in the chuck. I finally ran these 3 beveled sides against my grinder which created the flat areas it was supposed to have. Then it never came loose

Pros
  • Worked as advertised. I needed to add accessories to my boat.
Cons
  • Didn’t last long

Revainrating 3 out of 5

Dulled after single use

Dulled after single use - can't use it for that size anymore. Drilling out metal hole on thin metal box. Barely got through, then it was shot. But it was inexpensive and got the single job done.

Pros
  • Good bargains
Cons
  • I am a electrical contractor these bits do not do the job. Maybe for home owners at a 1 time use.

Revainrating 2 out of 5

Looks good but not very durable.

I was very impressed by the case and looks of this set. However, I burnt on of the bits up on first use.The metal I was drilling was not that hard.

Pros
  • I used only a few times and it seems to be holding up ok.
Cons
  • The set's advanced features may make it difficult for inexperienced users to handle and operate effectively