About This Materials: Stainless steel, Anti-residual magnesium designed. This magnetic door lock provides a strong sense of security with its outstanding holding force 1200Lbs (500KG) and significant features. Size: The lock size is 10.43 x 2.95 x 1.54 inch (265 x 75 x 39mm); Armature plate: 7.28 x 2.36 x 0.51 inch (185 x 60 x 13mm). Holding Force: 1200kg (500KG). Mode: NC Mode (Fail-Safe Mode), Locked whilst power supply is operating, unlocked when power off; Voltage: DC12V. Security protection: This electromagnetic lock has safety function. It is built in voltage spike suppressor. Wide Applications: This electric magnetic door lock is suitable for Wooden Door, Glass Door, Metal Door, Fire Proof Door, Cabinet, etc. Overview Brand : YUANWIN Special Feature : Voltage Spike Suppressor, Fail-Safe Mode Lock Type : Electromagnetic Lock (Fail-Safe) Item dimensions L x W x H : 10 x 3 x 2 inches Material : Stainless Steel