PTSLKHN 10-Piece Metric Hex Shank Drill Bit Set | 4" S2 Alloy Steel Allen Wrench Bits | Magnetic Tips for Precision | Industrial-Grade Durability

They work well. Magnetic and decent quality. Good price. Would recommend to a friend.

Okay, I bought this for my electric skateboard but I've used it far more putting together furniture. This is an amazing piece of kit and highly recommend it!

Works good

These are pretty good. I haven't had the smaller ones under appreciable torque yet but they seem to be made from a quality tool steel and they are well machined. Sizing for most was spot on, and the three that were off were just very slightly undersized but not enough to matter. The finish isn't super durable and I have a couple that have developed a little flash rust just sitting in the tool chest, so if you're in a humid dusty area maybe keep them oiled like you would many other tools. The hex end is accurately sized and fits nicely in the adapters I have, very little wiggle. They're shipped in a tin box, they don't all fit in there horizontally, but it'll likely arrive dinged up or bent anyway (yay Amazon shipping). I was hoping for a little more from the finish and that's why I spent a couple bucks more on this set when I purchased them, but they're still good bits, worth buying, and a good value.

I purchased these hex bits for a specific use where a hex screw was set deep. I prefer hex bits to the standard Allen keys and have a set with shorter shafts. These bits were at the right prices and listed as an Amazon choice. These hex bits are my first choice when needed. There is one small annoyance: the bits are magnetized and tend to jam together, making pulling them out of the case difficult.

I really like these and sometimes you need the extra length. I tested the fit vs other bits and checked with my caliper and these have very low tolerances. This is a very good thing when working with do-it-yourself furniture assembly. Most of the hard ware that comes with cheap furniture is soft and is easy to round out so you want a tight fit. I’m not using these with an impact so use at your own discretion. In my experience, installing fasteners with a head size of 4mm or smaller should never be impacted anyways because it usually requires a lower torque rating and will end up damaging more than just the bit or fastener.

8mm bit is oversized. Barely fits in the cap screw head and gets lodged inside it when you force it in. I had to remove significant amount of metal from all sides of the hex shank at tip in order to be able to use it. I haven't tried the other sizes but I bet they portray the same problem.

These have exceeded my expectations. I go through a lot of 2.5 and 3mm bits due to rounding. I’ve been using these for a couple months and so far they have been holding up well. Great durability and value.