With its 1500 pounds of holding force, the Thunderbolt 1500 will address your security needs as well as your need for peace of mind. No screws are exposed on the units exclusive tamper-resistant cover, and users can service the coil themselves. The Thunderbolt 1500s dimensions are 2" x 2" x 13.1" (5.08 x 5.08 x 33.3 cm), with a 2 magnetic profile. It features optional door position switch, magnetic bond sensor, and AC or DC operation.