Electric strike 118SRR Product description Model with monitoring contact as potential-free changeover contact, actuated by the latch bolt. Overview of Advantages Radius keeper, FaFix®, adjustable by 3 mm Universal voltage Compatible with DIN 18250 mortise locks Symmetrical design. DIN left/right as well as horizontal applicable Electric strike 118Seffeff Smoke Protection Electric Strike 118 with FaFix® (FF)