I bought two bass drum risers for my Premier bass drums but there is a fitting issue. They fit but are originally intended to be fitted to Sonor bass drums, if I'm not mistaken.
They move during playing, too. There is no locking mechanism. It should fit exactly with the bass drum but, again, was made for Sonor drums.
If I knew it, I would not have bought them. I bought the Gibraltar bass drum risers and they are much better although ideally they should have locking positions, but that is for an other review.
Even the plastic part where the pedal grips is not variable in height or length adjustment. This bass drum lift was made for Sonor bass drums and that's all. Overall, disappointed.