Sign Standoff Screws Advertising Screws Stainless Steel Wall Standoff Mounts Glass Acrylic Nail, 8 Pieces (1 x 2 Inch) 1 x 2 Inch auspowers_batchthree 5in Space of two pin: 11mm sold2024 5in Space of two pin: 11mm Two pin standard diameter: ear 3 positive joint action with no chance of slipping position or coming apart under load Product Features International Tooth Pitch Cast with standardized dental equipment for high accuracy Read more Detailed Steps for Use Use electric drill to punch holes in the wall (the size of the drill bit can be determined according to the size of the expansion tube) Hammer the expansion tube into the wall with a hammer Unscrew the base and screws of the advertising nail Read more Detailed Steps for Use（Continued） Pass through the base with a screwdriver (from the direction of the large mouth to the small hole inside the base screw) tighten Screw rod through the billboard sign