Review on Milwaukee Electric Tool 49-56-7250 Quickchang Drill Bit by Brent Porter

Okay, I know - most users probably don't care that the two-pin latching mechanism is always loose on the shaft. It features a ball bearing spring that allows the engagement pins to raise and lower, allowing you to screw in the sleeve before the pins engage. However, the pins, threads and timing for the engagement pins provide the required clearances. its careless engagement and not reliable enough not to stagger when engaged. The threads break too. I would have preferred a simple lock nut to this over-complicated "quick-change junk". Now my 4 1/8" hole is actually 4 3/16".