This bike lock holder is for a Kryptonite Evolution LITE Mini-6 U Lock 2.75 x 5.9" and attaches to a Surly Rear Rack.

You'll also need

• two #8 1-1/8 length socket head screws
• two #8 square nuts (11/32" side length, 1/8" thickness)
• 1/8" bungee cord

Modeled in Fusion 360. You can view and download the model.