Standoff Screws Wall Mount Sign Holders Acrylic Glass NailsProduct Details1.[Advantages] Adjustable screw cap, solid screw teeth. The matching rubber gasket makes the screws more fit and not easy to fall off.2.[Material] Stainless steel makes standoffs smooth and bright in surface, solid and modern, with great durability and dependability.3.[Size] Total Size: 27x16mm/1.08"x0.63"(L*D); Thread Size: 18x9.7mm/0.71"x0.38"(L*D); Bottom Hole Dia.: 4.8mm/0.19"; Rubber Spacer Thickness: 1.3mm/0.05"; Screw Nail Cap Thickness: 5mm/0.20"; Elevates Signage Height: 20mm/0.80"; For Max Panel Thickness: 12mm/0.47"; For Max Panel Hole Dia.: 12mm/0.47"4.[Application] Screws holders usually used to support and fix acrylic and glass plates, and can also support glass plates on wooden bases.