Electric strike for mortise locks, 12 or 24VDC, Field selectable fail-safe/secure, Heavy duty design with five faceplates included, Satin stainless steel fnishThe MDS100 Series electric strike is designed for use with heavy duty mortise lock sets and cylindrical lock sets. Five different face plates included for optional flexibility of installation in wood or metal frames.Features and benefits:Heavy duty design with vertical adjustments for flexibilityField selectable fail-safe and fail-secure (fail-secure default), with simple and easy screw reversal on non-fire rated modelsIncluded trim piece for installation flexibility and improved appearanceMounting tabs included for aluminum frame installation on non-fire rated doors in non-fire rated applicationsFive stainless steel face plates included for optional flexibility (4 7/8" x 1 1/4" with differing cutouts)Field selectable 12/24 VDCBuilt-in voltage spike suppressor includedSuitable for rain or dust environment Main FeaturesUL1034 Burglar-resistant electric locking mechanisms, listedUL294 (indoor), listedStatic strength of 1500lbs.. static load, UL certifiedDynamic strength of 70 ft.-lb. dynamic load, UL certified250,000 cycles endurance, UL certified