The Von Duprin 6100 Series is a heavy-duty, stainless steel electric strike that is UL1034 listed and meets ANSI/BHMA Grade 1, and is designed to withstand abuse. The 6121 is designed to be mounted on the inactive leaf of a double door without a mullion. Designed to be used on hollow metal or aluminium commercial door frames. See all our Von Durpin Electric Strikes.