Features: Made of quality aluminium alloy material, lightweight, oxidation treatment, corrosion resistance, durable for long time use. With a 1/4'' screw on the top and a 3/8'' screw hole on the bottom, compatible with most cameras and tripods. Compatible for many types of quick release plate, suitable for RCA-SWISS, RRS, KIRK, MARKINS, SUNWAYFOTO, etc. The slider track design enables flexible movement of cameras on the plate, not need to move the tripod when you want to move the camera. This item can gives you possibility of making close-up and follow shooting due to its long track and precise dial, which greatly widen your shooting range, can be used with ball head, just rotate the ball head, then the track length doubles. Built-in bubble level is good for accurate and quick angle adjustment, the locking knob can make the quick release plate removes from the clamp mount in seconds, convenient to use. Specification: Material: Aluminium Alloy Color: Black The width between the slots: 33mm Size: Approx. 18*3.9*1.6cm / 7.1 x 1.5 x 0.6in Weight: Approx. 183g Package List: 1 x Quick Release Plate 1、Made of quality aluminium alloy material, lightweight, oxidation treatment, corrosion resistance, durable for long time use. 2、With a 1/4'' screw on the top and a 3/8'' screw hole on the bottom, compatible with most cameras and tripods. 3、Compatible for many types of quick release plate, suitable for RCA-SWISS, RRS, KIRK, MARKINS, SUNWAYFOTO, etc. 4、The slider track design enables flexible movement of cameras on the plate, not need to move the tripod when you want to move the camera. 5、This item can gives you possibility of making close-up and follow shooting due to its long track and precise dial, which greatly widen your shooting range, can be used with ball head, just rotate the ball head, then the track length doubles.