Genuine Bigsby® aluminum neck shim for use with B16 or other vibratos. This item is a replica of the original 1953 Bigsby® neck shim made for Telecasters using the B16 vibrato. These shims are made of a lightweight aluminum and raise the neck
” for a proper angle to work with the floating bridge. The shim is not drilled. Bigsby suggests using a ⅜” drill bit.