Beware of dog signs for fence has pre-drilled mounting holes on all four corners for mounting with screws and ties. 【EASY TO INSTALL】:The Beware Of Dog Signs For Fence Has 4 Holes, They Can Be Easily Mounted On Walls, Fences, Trees, Poles, Rods, And Anywhere Else, You Just Need To Use Screws, Nails, Zip Ties, Or Wires To Easily Mount It On Any Surface Such As Your Walls, Gates, Barbed Wire, Fences, And So On.