HES 5000-LBM Fail Safe/Fail Secure, Body Only, 12/24VDC Electric Strike, Latchbolt Monitor The 5000 series is a compact, high performance electric strike designed for low profile openings where there is limited space behind the jamb. Its strength is derived from a unique keeper pin locking design, enabling the 5000 to exceed the ratings of the frame, door and locking hardware. This field selectable fail secure/fail safe unit is easy to install and accommodates latchbolts up to 5/8" throw.