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🔩 Efficiently Drill Through Stainless with HPHOPE Straight Suitable Drilling Stainless Review

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Average

Revainrating 3.5 out of 5  
Rating 
3.7
🪚 Industrial Drill Bits, 🔪 Cutting Tools

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Description of 🔩 Efficiently Drill Through Stainless with HPHOPE Straight Suitable Drilling Stainless

【M35 COBALT HIGH SPEED STEEL】1/4" drill bits for metal made from M35 Cobalt High Speed Steel and contain 5% Cobalt, which increases wear-resistance, durability and extra longer life span, so that the drill bits last through multiple uses. 【135° SPLIT POINT】135°quick-cut pilot split points are self-centering and can penetrate quickly with less pressure. Straight shank of this cobalt steel drill bit allows for firmly holding and accurate centering and makes drilling precise and faster. 【FULLY GROUND PROCESS】Fully ground spiral groove design clears particles quickly, decreases friction and heat for faster drilling performance. 【PROFESSIONAL & WIDELY USE】Jobber drill bits perfectly Suitable for drilling holes as Stainless Steel, Copper, Cast Iron, Galvanized Pipe, Aluminum Alloy, Wood and Other Softer Metals. Not for Glass or Ceramic Materials. 【EASY USE & STORAGE】This metal twist drill bits set includes 10pcs 1/4" Cobalt Drill Bits, This drill bit fits the majority of power drill currently on the market and come with a portable plastic case for easy storage and DIY, household maintenance and repair

Reviews

Global ratings 3
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  • 3
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  • 2
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  • 1
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Type of review

Revainrating 5 out of 5

Surprisingly good product for mild steel dill

I've been using one of these drill bits for two weeks now and have drilled hundreds of holes in steel cases and steel mounting plates. and post. while all on a drill. I am very satisfied with this product. They do an excellent job at the job I use them for.

Pros
  • Drill bit
Cons
  • Available in white only

Revainrating 5 out of 5

Extremely good drill bits

I used these 1/8 inch drill bits to drill screw holes in the metal panels on my garage roof. I drilled about 1200 holes with a drill. It still cut fine when I finally broke it (my mistake - I pushed it sideways), I took a second bit and drilled about 200 holes with it and it still works. I was so impressed that I ordered a 1/4 scale version of the kit which I have not yet used. I can not find other sizes, if I find them I will buy with great pleasure. Roger Larsen

Pros
  • Twist drill bit
Cons
  • Slightly torn

Revainrating 1 out of 5

DEFINITELY NOT COBALT DRILLS

I used to work in a machine shop so I'm pretty sure - I've tried drilling stainless steel muffler tips less than 1/16" thick and the Bits hardly remained a dent even after 4 bits are completely blunt. Various combinations of low speed and low pressure have been used - and combinations without cutting lubricant, cutting paste and cutting oil. These drill bits are no better than plain black oxide drill bits when it comes to drilling stainless steel (which is exactly what cobalt drill bits are…

Pros
  • Electric Drill Parts and Accessories
Cons
  • Expensive