New Hejnar Photo Quick Release 10.00 inch rail with 3 captive style slots. 5/8 (0.625) inch thick. Engraved metric scale for references on each side of the rail. Rail also include one 3/8-16 and one 1/4-20 taped hole on top . In addition to that each rail end has one 1/4-20 taped hole and two dowel pin holes. Works great as dual side lens support in combination with small clamps and Lens support bracket ( clamps and lens support sold separately)It is the best quick release system for tripods and monopods when combined with Arca style ball head and clamps. This plate is designed to work with variety of ARCA TYPE quick release systems.
Rail can be used as:
Macro Rail
Lens Plate
Need to put more light through an umbrella in the studio MPR will do.
Long lens support, ( in combination with lens support bracket)