This side mount torque bar operator is for a 3/8" square bar. 

Choose right or left based on photos. Your orientation and installed handing may be different.

• Square bar socket is 3/8" x 3/8"
• Case Height: 2-5/32"
• Case Width: 1-5/32"
• Case Thickness: 1/2"
• Spindle extends from case 1/2" (smooth part only)
• Hole spacing: Top hole to bottom hole directly below it is 1-13/16" center-to-center
• Made of zinc with some steel components

Purchase swivel handle separately.