I purchased this drill and tap set for a project that required small screws ranging from m2 to m3 depending on location. All holes had to be made by hand. The material used is PVC and stainless steel. I didn't oil it, I just stuck it in dry and drove into town. I haven't had a broken faucet and every hole I cut has been clean and hassle free. I cut a dozen holes. Impressions: The faucets are well made. The thread is clean. The drill bits were sharp and didn't dull or break (I used a drill press). .The taps are still good and sharp. I have no regrets about these drills and taps. I have now bought another set of similar sized faucets just for the faucet handle. An improvement to this set could also be a good quality faucet handle to save new buyers the extra expense and hassle of finding a good handle that will hold smaller faucets properly. Advice for inexperienced users. Well, a few. If using small drill bits, use a drill press and work slowly, don't try to just push the drill bit through the material. It's not sex and you're not 14, so take your time and exercise properly. Also use lubricants, synthetic motor oil works great. Drill a bit and pry it out of the hole to clean it and apply more lube! Make sure your work is held securely as any movement and small parts can break if forces are applied in directions they shouldn't be. When tapping, especially small taps, insert the tap into the drill chuck like a drill and keep firm downward pressure while rotating the chuck spindle BY HAND. DO NOT attempt to cut threads with a motor. Use lube again! Lots of lubricant when tapping. Once you start threading the thread 1/4-1/3 turn and then loosening it slightly to clear the shavings and keep debris out of the hole. The only thing I can add is small drill bits and taps. break them! They are brittle due to lack of mass. If you squint your eyes a little when turning under pressure. Click! That's part of the game, especially when you're making things by hand with little bits and taps. Translation, you probably broke it, and the tap or drill didn't "failed". So remember, just replace the broken part and keep going!