Review on 🔧 High-Quality Hex Head Allen Wrench Drill Bit Set (24 Pack) - Metric & SAE - Magnetic Tips - Durable CR-MO Steel Alloy - 2.3" Long by Nhyiraba Wilson

I bought these for a specific application. I liked that they worked with a drill/screwdriver hex head to speed up my work (compared to a traditional L or T handle hex wrench that I had to turn by hand. In that sense they worked well and speeded up my work Project for me.. can't ask for more. There are a few issues though. As others have pointed out, it's hard to tell how close the smaller blocks are machined to the specified tolerances. I don't have calipers installed on mine, but some of the smaller bit ends look uneven compared to a finely machined tool.Another issue I had was toughness.Their advertising as "hardened steel" is one of the reasons I chose this set 10 millimeter tip trying to open my transmission drain plug, part of the fault here probably lies with the dealer's 'technician' who removed the plug tightened very, very last time more than the spec calls for. And part of that I'll probably say is that I love myself for asking the tool to maybe do more than it was designed to do. In the war between the 1/4" box wrench and my transmission drain plug, the only casualty was the 10mm hex bit. So to sum up, this set fits all the right cases. If you're moving fast and have an electric drill or a 1/4" Want to use inch screwdrivers to speed up the process these drills are great a reliable option at a reasonable price If you need to do heavy duty work you may find that this is not the best option.