No back, screws included. 

Bauer BP-20 Slam Latch Cargo Door Lock RV/Camper/Travel Trailer

• Patented SCI technology to prevent tampering with lock cylinders.
• Overall Dimensions: 5" L x 4.53" W x 1.5" depth.
• Cutout Dimensions: 3-1/4" x 4"
• Weight: 5 lbs.
• Includes (1) slam latch door lock, and (1) key.