Application: to install cameras on exterior wall corner ,pole,pipe or tree,to get a wider view range Holes Type: cross（+） type holes， with 2pcs 1/4‘ screws Material: stainess steel Size: Mount Length 180mm(7'), Clamps diameter：max 200mm(7.8') Package: mount,screws,2 clamps WiTi Stainless Steel Corner and Pole Mount Bracket for Surveillance Camera, Extension Arm Holder for CCTV IP WiFi Battery Cameras, Security Surveillance Systems Installing Indoor and Outdoor