5mm bar gauge
You may have to find out the perfect dimensions with spending much money to get metal version custom cage time by time
If you choose customize size option to place your order
if you are not a customer who has purchased the equipment applied this screw
Titanium Piercing Padlock Hook gauge:12mm 5mm bar gaugeLock with BAWR proprietary screw. comes with 2 screw keys Hook Gauge option: 2mm,3mm,4mm,5mm,6mm,7mm,8mm,9mm,10mm,11mm,12mm S style option: width 15mm,height 13mm L style option: width 21mm,height 16mm custom style option to allow you customize padlock's shape, inner size. Better to upload a drawing to make your custom order more specific.