Although I own many drill sets, I researched them carefully before purchasing this one. I bought Longmate bits on purpose because they are fully ground from M2 high speed steel. Not all high speed steels are M2 (6% tungsten, 5% molybdenum, 4% chromium and 2% vanadium) and bits may be forged or ground on the edges rather than being fully ground. Of course, once the titanium nitride coating on a drill wears away, what remains is the metal that the drills are actually made of. From a practical point of view, the M2 is just a notch better than the M35, which adds 5% cobalt. Upon receipt I noticed that the Longmate bits fit and finish quite well and they feel exceptionally sharp. I haven't used them on any type of metal, but I was pleased that they drilled through 3/4" thick plywood and 3/4" solid oak much faster than any other drill bit I've tested. Of course, all drills will drill through wood, albeit blunt ones. Drills can burn hard wood. However, if you have a lot of holes to drill, it makes sense to go 3/4" (literally) in 2 seconds instead of 4 or 5. If you read bad reviews about drill bits of any brand/set when drilling in metal, refer most complaints relate to the inability to drill through steel Several factors come into play: did they drill too fast, or not perfectly straight, or without adequate lubrication, is the bit sharp, what is the quality of the coating on the bit and the bit itself (what the bit itself is made of and what technology the bit is made of.) If you plan on drilling in hardened steel, you should definitely get a cobalt set.Longmate makes the M35 set very similar to this M2 set.If you If you intend to drill in softer steel, aluminum, copper, brass and other "soft" metals, you're better off with a quality titanium-coated M2 set like this than another set with less coverage and/or low quality. high speed steel. Choose the right tool for the job, follow the right procedures, and the chance of failure will be greatly reduced. I look forward to using these Longmate bits for more advanced tasks and will update this review as needed.
Tool set Stels Tool set, 1/2", 1/4", CrV, plastic case 94 pcs, Stels, 94 pcs, black
45 Review
MICHELIN Latitude Sport 3 235/60 R18 103W summer
22 Review
Bit and socket set BOSCH Promoline (2.607.017.322), 26 pcs.
24 Review
Cordless drill driver BOSCH GSR 120-LI (06019G8020/06019G8000)
54 Review