HES 1500C 630 Electric Strike, for Cylindrical or Mortise Latchbolt Locks, Auto-sensing 12-24VDC, Field Selectable Fail Safe/Fail Secure, Includes 1J, 1K, 1KD, 1KM Options, Satin Stainless Steel The HES 1500 Series electric strike is more than a new heavy duty, low profile solution for latchbolt locks. It accommodates every brand of cylindrical or mortise lock designed to work with a 4-7/8" strike plate.