Good concept,poor execution. Bits are ridiculously difficult to insert and impossible to remove without a pair of pliers. Needed a small neodymium magnet for retention instead of the oring. I'll give it a 3 because I'm feeling generous and build quality is good, but I won't be using it, and for $23 I'm not going to send it back.

Another great accessory designed by Joe Wu great customer service and fast shipping