Electromagnetic Lock Surface Mount Opening Action Electromagnetic Steel Amp Draw @ 12V 650mA/12V DC Amp Draw @ 24V 350mA/24V DC Input Voltage 12/24V DC Projection from Wall (In.) 1 3/4 in Features Bond Sensor and Door Status Monitor for Single Outswing Doors Total Projection (In.) 1 3/4 in Holding Force (Lb.) 1 500 Armature Length (In.) 10 1/2 in Armature Width (In.) 2 5/8 in Armature Depth (In.) 1/2 in Lock Body Length (In.) 12 1/2 in Lock Body Width (In.) 3 in