New Hejnar Photo Quick Release 5.250 inch rail and 1.5 inch mini clamp. Something similar to rail with integrated clamp after assembled. Works very nice as nodal slide for panorama photography. I do provide 2 dowel pins with rail. They prevent clamp from twisting. Clamp itself is 1.5 inch with dual mounting and captive style knob. Clamp can be oriented in 3 different direction when mounted onto rail. Hard coat black anodized surface. If you want clamp go higher just use 1/4 or 3/8 spacer block and you are there ( spacer block sold separately)
It is the best quick release system for tripods and monopods when combined with Arca style ball head and quick release clamps. International standard dove-tail rail, compatible with Arca-Swiss type quick release clamps and rails.