this will work on your Sonor bassdrum legs and floortom legs. On floortoms just mount them on the legs and they will speed up rigging time since they will always stay in the right angle and height as the first time.
Just remember to put them under the floortom holder otherwise you cant remove the legs when you rig down.
There are rights and lefts but it really makes no difference if you get two of the same since you can unscrew the screws and just fit them on from the other side to make change a right to a left and vice versa. Excellent Sonor quality and craftmanship!!
It may seem hard to get excited about memory locks but they save an enormous amount of time when setting up a drum kit. You know what height your floor tom needs to be, and with a set of these handy locks no time is wasted in ensuring it's right where you want it.
They probably seem a bit pricey (about £5 each - and you need 3 for a floor tom) for what they are but once you have them they just need fitting once and you don't have to worry about them again.