Sell electric dropbolt

electric dropbolt
1. easy installtion, CE, UL approved

2. scope of application:application all type of door. no frame door can choose bracket. all swinging doors

3. fail-safe operation

4. temperature rating:-40c-100c

5. different series different sizes

6. accessories optional:access control, power supply, door closer, ect

7. delay function:the time delay is adjustable

8. your own design is always welcome