The 3510LM cabinet lock is a compact, surface-mounted lock for small enclosures. Great for home-made concealed gun cabinets and other applications. Holds 250 lbs. of force. Use with a spring to create your own custom pop-out cabinet design. This electric lock has side or top mounting capability for easy installation which makes it suitable for a variety of applications. Positioning of the locking pin determines the lock mode. A twist of the pin changes the lock from fail-safe (locked when power applied) to fail-secure (unlocked when power applied) during installation. The included internal monitoring switch indicates whether the mechanism is locked or unlocked for monitoring. Use it in conjunction with a plug-in-transformer and an affordable electronic keypad. 12V or 24V DC or AC operation, field selectable. Dimensions: 1-5/8" W x 1-7/8" H x 13/16" D (42mm x 48mm x 20mm)