Used with Die-Cast hoops
The Pro-Lock is used to secure the 3,4,5 and JR Snareweights to die-cast hoops.
Pro-lock's incorporated arched magnet attracts the Snareweight #4 through the die-cast hoop. It also has a slot that the Snareweight drops into thus creatimg a floating lock to secure the damper.
Snareweight #5 with a Pro Lock is as good as it gets for dampening and for road worthy durability.
Because of the lock between the two magnets, it will reset itself and fall back into place with perfect contact and balance.