Securely fix your mount to flat surfaces using one of Quad Lock s Rectangle Flat Hole Bases. Choose between a 2 hole or a 4 hole base. Both bases can be fixed to flat surfaces vertically, diagonally or horizontally. Each base uses the universal AMPs hole spacing standard & the holes will accept 10G or M5 countersunk fasteners. If using the 4 hole base, it is recommended to use all 4 hole screws for the strongest connection. A 10 mm Spacer & 2 screws are supplied for connecting the spacer to a Quad Lock 360 HEAD or ARM. Features 2 hole base 68.5 mm (2.7") long x 28 mm (1.1") wide x 14 mm (0.55") high AMPS Hole Pitch: 48.5 mm (1.9") Features 4 hole base 58 mm (2.3") long x 50 mm (2") wide x 14 mm (0.55") high AMPS Hole Pitch: 38 mm (1.5") x 30 mm (1.2") Scope of delivery 1 x Flat Rectangle Base (2-hole or 4-hole) 1 x 10 mm Spacer 1 x M5x 30 Screw (for connecting Spacer to Lever Head or 360 Arm) 1 x M5x 45 Screw (for connecting Spacer to Weatherproof Wireless Charging Head) Notes Screws...