The HES 5204 1/2" Stackable Lip Extension for the 5200 Series Electric Strikes is designed for metal or wood frame applications, providing secure and reliable performance. This tamper-resistant accessory features selectable fail secure/fail safe modes for versatility. It supports DC continuous duty and AC intermittent duty, with impressive strength ratings: 1,500 lbs static and 70 ft-lbs dynamic. Built for durability, it endures up to 500,000 cycles and operates on dual voltage (12 or 24 VDC/VAC). The strike body depth is 1-1/16" and includes a convenient plug-in connector. Upgrade your security with this robust extension today!