The strikes come in two varieties, asymmetric with the SD-994A-A1AQ and symmetric with the SD-994A-A1SQ. Both models come with a reversible faceplate for right-hand or left-hand doors and have a fail-secure operation.

The electric strike comes equipped with the additional following features, including  an 8-16 VAC/12VDC operating voltage, a fail-secure operation facility,  a robust 1,000-lb (453kg) jaw strength and a miniature lock body for easier installation.