4091-8 : 20" Glass Shelf with Rail Satin Nickel Attica Series Di mention Installation for Drywall and Tile: 1. Using included template, mark screw positions. Use level 16 ensure screw positions are level, 2. Using drill, drill guide holes at each screw location, 3. Insert screw anchors {2} into wall until flush with surface. 4. Attach brackets (3)to wall with lip up away from wall and install screws (4) into bracket. 5. Install base by tiling TOP edge to wall and connect to top lip.