Standard V-Rod Device. Fits all standard metal and wood doors 1-3/4 thick standard, 2-1/4 optional. Stainless steel, painted aluminum. Device compatible with 161-cutout on hollow metal doors. Surface mounted top and bottom strikes standard. Stainless steel springs throughout. Black coated steel Strikes. ANSI 156.2 grade-1. 36 or 48 widths. UL listed.