Oyster cap opener
A double-ended instrument with one end specially designed to open the cap on the Oyster brackets (pict. 1), and the other end with a wire director and height gauge (pict. 2).
You can download the Oyster instruction video here!
Oyster DivX 1,8 MB 
Requires DivX Codec,download at www.divx.com
Oyster
Mpeg zipad 3,4 MB