UHPPOTE Electric Strike Fail Secure Mode Lock a Part For Access Control Wood Metal Door Fail secure, NO mode (Locked when power is removed) Holding force: 500kg / 1100 pounds Suitable For: Wooden Door, Metal Door, PVC Door Strike lock need work with mechanical lock. Mechanical lock need buy separate. It's a solenoid with one function, can be wired any way. With two contacts and no polarity requirement. (The lock will have polarity when a diode added.) Holding 500kg (1100 pounds) Aluminum, Stainless Steel Bolt Testing to 1000000 cycles High-Temperature Painted, Durable and Beautiful Article CE Certificate by European Union, MA Certificate by China Public Security office It&#039;s a solenoid with one function, can be wired any way. With two contacts and no polarity requirement. (The lock will have polarity when a diode added.) Lock Size: 150Lx39.5Wx34H(mm) / 5.9Lx1.6Wx1.3H(in) It structure: Zinc alloy Finishing: Electroplating Holding Strength: 500kg / 1100 pounds Voltage: DC12V Current: 200mA Fail secure, NO mode (Locked when power is removed) Suitable For: Wooden Door, Metal Door, PVC Door Surface Temperature: Within +20 / 68 Suitable Temperature: -10~+55(14-131) Operating Humidity: 0~90% (non-condensing) Function: Built-out MOV Net Weight: 0.29kg / 0.64lb 1 x Electric Lock (NO Mode) 1 x Diode 1 x User manual 2 x Screw Strike lock need work with mechanical lock. Mechanical lock need buy separate. Strike lock need work with mechanical lock or knob lock which need buy separate. Fail Secure lock need wiring to NO and COM contact. (Other parts shown on this photo not included) Suitable for metal and wooden door frame With two contacts and no polarity requirement. The lock will have polarity when a diode added. The diode can protects strike from over voltage,so would solder it into the positive side. Work with knob lock Knob lock should buy seperate 150Lx39.5Wx34H(mm) 5.9Lx1.6Wx1.3H(in) 1 x Electric Lock (Fail-Secure Mode) 1 x Diode 1 x User manual 2 x Screws