Electromagnetic Lock, Surface Mount, Opening Action Instant Release, Steel, Amp Draw @ 12V 350mA, Amp Draw @ 24V 170mA, Input Voltage 12/24V DC, Projection from Wall (In.) 2 1/4 in, Features Automatic Dual Voltage, Internal Wire Access Chamber, Tamper-, Total Projection (In.) 1 11/16 in, Holding Force (Lb.) 600, Armature Length (In.) 10 1/2 in, Armature Width (In.) 2 1/2 in, Armature Depth (In.) 1 11/16 in, Lock Body Length (In.) 10 1/2 in, Lock Body Width (In.) 2 1/2 in