i have been using makita in my shop for about 8 years. I bought 4 of these drill bit sets and they all still work except for one drill bit which ended up gathering dust and starting to smoke and burn. I use my drills every day and they fall and crack and are used with a lot of force and they just keep going. Also use these drill sets to charge batteries and chargers. The ImpactDriver is particularly impressive. I have literally drilled tens of thousands of screws, bolts, lags, and used socket adapters, bit extenders, hex drill bits, 10" TimberLOK structural screws, etc. Also handles dense materials, EWP, hardwoods well. Can't say enough about these drill sets. Great battery life, fast charging.