The Rickenbacker 335 and 365 ship with an Accent vibrato. It used to be that swapping that out for a solid tailpiece meant drilling new holes becasue tyhe brackets aren't interchangeable. That's not good. This is: this bracket uses the original strap bolt hole to secure a compatible bracket. No muss, no fuss, no holes to drill.
335/365 Accent-R/harp adapter bracket