The HF ones are OK, but they don't make them in 1/4" drive- I assume because of the design. I have the HF in 3/8, and they work ok, but I can pull a socket off of them without much difficulty. While this is probably acceptable, I have the SK in 1/4 and 3/8 and can't pull a socket off of them within reason; it's a far superior design. So, if you want locking extensions in 1/4, then this style might be your only choice. And if you actually want very secure retention, this style is better over the ball retention method that's also used on QR ratchets.