Cherry Keeper Custom - CKC-Q5MGEM-19Cherry Keeper Custom CKC Q5MGEM 19 75. 6mm total length, 34mm head inside diameter, 31. 8mm head length, 32mm shaft inside diameter. HeadLock is 28mm. Sparse bars on tip and shaft section. HeadLock The HeadLock feature adds a smaller ring to the entrance to the cage, restricting the opening in such a fashion as to hold the head in place when properly sized. The HeadLock ring will also put an end to casual pull out attempts if a sufficiently large