This rail is perfect to use when you need to focusing very exactly on your close up objects.
The rail is totally 180mm long and you can adjust distance of 160mm range. The rail itself is made in Arca-style, which makes it fit directly on a tripodhead with Arca-standard.
With 4 detachable foot nails, you can use the rail directly on table top, or mount it on a tripod, with the hole in the bottom with 3/8" or 1/4" size.
Collapsible thumb-screw knob for easy adjust and store.
360 degree rotating head, makes it very versatile in your setup.
You have engraved index marks on both sides of the rail for fine adjustment.
An ergonomically designed long quickrelease plate (with Arca-standard) for easy lock and remove, and fits to all type of lenses and also have a groove for strap