These are sturdy and so easy to use. Easy to install, a small screw driver required. 4 Pieces plus 2 screws for each lock. (Packages contain 3 screws so you have one extra!) Make sure you use a thread locking liquid or glue to secure screws, and glue to adhere metal pieces. 

Measurements:

• Width (left to right) 1-1/2" or 40 mm
• Height (middle center to bottom center point) 11/16" or 18 mm
• Full height (with lock flipped down) 1 - 1/8" or 30 mm

Go HERE for installation tutorial.