Review on 🔧 6 Pcs 1/4" Hex Shank Keychain Extension Bar Screwdriver Bits Holder | Socket Adapter Drill Bit Screw Adapter Fast Change Bit Holder for Electric & Hand-held Screwdrivers by Francisco Yim

These holders would be amazing if there wasn't one major drawback. You pull the cartridge towards the end where you would insert the bit or down from the key fob to release it. The problem is that if you attach it to a tool bag, if it gets caught on anything, you'll lose the bits it's holding. Gave me a few chances. If you had to pull the cartridge away from the bit or towards the end of the keychain to disengage it wouldn't be a problem. I work as an HVAC technician and I have to constantly put my tool bag in hard to reach places so they just don't work. If you just wanted to put them in a permanent place they would never move to, they might be worth it. Also, they seem well made for the money, hence the 3 stars.