Bought these for Session Pro DD505 kits that I use for my music school. A lot of brands use the same components and these are the same. They are exactly the same components as on the original kit so the replacement is simple and quick and you can be sure they'll fit perfectly. Just a word of warning from previous experience, it's quite easy to strip the threads on these, it's not the strongest of metals used in the bolt. They also have a habit of the threaded shaft and the ring parting at the weld if you over-tighten, quite frustrating, particularly as these things aren't easy to find.