The NiSi Macro Focusing Rail NM-180 with 360 Degree Rotating Clamp gives you the ability to precisely adjust the position of your camera when shooting macro photography. The rail is equipped with an integrated Arca-type compatible quick release clamp and also includes an Arca-type plate. The focusing rail itself has a double-dovetail mount and will fit most Arca-type clamps on the market. The mounting clamp allows 360-degree rotation to change the camera direction without having to remove the plate from the clamp. The adjustment range is 160mm while the clamp size is 180mm, maximizing the movement of the camera. The movement is adjusted by a Collapsible Thumb-Screw Knob which makes it easy to adjust and store. Included is a longer quick-release plate designed for telephoto lenses and with a groove for straps and is easy to lock and release. The maximum load of the rail is 5kg. The Macro Rail can be mounted in most Arca-type clamps/ball heads on the market and also includes four detachable foot nails that allow the use of the rail directly on the tabletop. The stage travel per revolution is 1.25mm with engraved index marks on both sides of the rail for fine adjustments. The bottom for the rail includes 3/8” and ¼” screw hole which allows the use of all tripod heads. The NiSi Macro Focusing Rail NM-180 with 360 Degree Rotating Clamp is constructed with high-quality CNC machined aluminum and is hard anodized with a corrosion-resistant finish. These features make it scuff and scratch-resistant. The two focusing rails can be stacked for dual-axis adjustments. The NiSi Macro Focusing Rail NM-180 with 360 Degree Rotating Clamp is the perfect companion for the NiSi Close Up Lenses.