All levers conform to ADA requirement for barrier-free accessibility. The backset is the distance from the edge of the door to the center of the 2-1/8-inch bore hole in the face of the door. Latchbolt-stainless steel, 1/2" throw with 2-1/4" x 1-1/8 front.Strike- ANSI curved lip standard, 4-7/8" x 1-1/4" x 1-1/4 lip. Anti-rotational through-bolts at 6 and 12 o'clock positions. This item is in the category "Business & Industrial\Building Materials & Supplies\Commercial Doors & Door Hardware\Commercial Door Hardware". The seller is "deb1269" and is located in this country: US.