Review on Enhance Performance with the SK 4516 3 Piece Drive Locking Extension Set by Janet Edwards

After receiving these extensions I have used them several times. I have yet to have an extension drop without first shifting the collar to loosen it. These extensions are some of the best I've used over the years. Although I had a hard time buying them. It looks like S&K is in the process of reorganizing and it's currently difficult to buy enough of their tools, including these extensions. I hope they solve your problems as they make high quality instruments.