More from Amazon.com : http://www.amazon.com/gp/product/B00F2BWTCE?tag=purrfectcatdi-20 <br /> <br />FOTGA DP3000 DSLR QR 15mm Rail Rod M4 Quick Release Support System for Matte Box follow focus <br /> <br />Height of its plate can be adjusted by releasing and lock blue knob buttonHeight could be adjusted between 65mm and 70mm <br />Qcuick-release versionIt is with a big blue release-lock buttonwhich makes it is very easy and quick on attaching a camera <br />With 14 and 38 holes at the bottomwhich will be helpful to put a whole heavy follow focus system on a tripod for stablizing and safety <br />It is bigger and more sturdy than most 15mm rod rail baseplatewhich makes it much suitable for DSLRHDSLRHDV camerasetc <br />Safety-lock design which ensure your camera not fall off even you release the blue release-button
