The socket features a 3 in 1 square design for single sided fastening, eliminating the drop hazard of removing the socket from the adapter to change sizes. The Push and Twist Barrel Lock allows for secure, one-handed size changes, even while wearing gloves.
Good highline nut runner... But the best thing is if u break the adapter they are only $15-20 compared to $75-80 on my Klein transmission nut runner which has broken twice....The rice of it is a bit higher than others but seems to be worth it....