Rennie Tools - 25 Piece Cobalt Drill Bit Set Sizes 1-13mm In Metal Case | For Stainless Steel, Aluminium, Hards Metals, Cast Iron, Plastic & Wood. HSS Cobalt Jobber Drill Bit Set

Great kit. Only used so far for drilling out 13mm holes in 8mm thick mild steel. After circa 20 holes - you can’t actually tell which bits have been used. Great start.

Having tackled a few stainless steel projects recently, I can say these Rennie Tool bits are a real lifesaver. Standard HSS bits just don't cut it for hardened metals, but the 5% cobalt content in this M35 HSS set makes a noticeable difference. The 4-10mm sizes are a versatile selection for general-purpose use, especially for metalworking tasks. The 135° split point tips are a feature I particularly appreciate; they start drilling cleanly and accurately without the need for pre-punching, which saves a lot of time and effort. For the price, the performance is excellent. I’ve used these bits on stainless steel, cast iron, and thick aluminum, and they've held up and stayed sharp far longer than other similarly priced sets. While they might not last as long as premium-tier options for industrial use, they are perfect for serious DIYers and tradespeople who need reliable bits without spending a fortune. The included plastic case is also a nice touch. It's not the most rugged case, but it does the job of keeping the bits organised and protected when not in use. Overall, if you're looking for a cost-effective cobalt drill bit set that performs brilliantly on hard metals, this is an outstanding choice. It offers genuinely high performance for a very decent price.

Really good drill bits

I needed this type of drill bit as I had some drilling in stainless steel rod and my other drill bits were all useless. These bits were perfect at the job and showed no signs of being blunted by the experience. Fair price too.

Did the job for me. I needed to drill 4 10mm holes in galvanised mild steel perhaps 4 mm thick to mount trailer props. I did 4mm to start and then 10mm, using 3 in 1 oil to lube. Each hole was a few minutes and worked well. The 10mm seemed to have a bit of a cut on one edge but worked well for me.

Got these as couldn't drill a bit metal but realised made of stainless steel, got through it in seconds with one of these.

These seemed to do a good job of going through some thick steel. It took a while but much better than even titanium bits. I like this set alot but after using it I couldn't put the drill bits back because my drill chuck caused a bump on the drill bit and the tolerance on the holes is pretty tight. So the case is barely useful to me right now. Overall though a good purchase

Nice selection of drills, Easy to use and drill well

■ Alles Ok ■