These padlocks have to used hasp

Fitment
To ensure proper fit measure the hasp/latch on your trailer door
Size dimensions are illustrated in the provided schematic
Also check the depth of the hole on the hasp. If the center of the hole is more than 13/16 (20mm) from the edge the pin will not engage
The depth on the lock would be too shallow
Many times latches are poorly manufactured and the holes are carelessly placed off center, thus creating fitment issues
You can modify the hasp if you are inclined
Specifications
Brand:RESET
Model: RST-903
Material: Alloy Steel,Brass
Weight: 930g(2.06lb)(32.96oz)
Color:Sliver
Shackle Diameter :2.83 in(7.2cm)
Shackle Vertical Clearance:0.5 in (1.3cm)
Shackle Horizontal Clearance: 1.75in (4.5cm)
Package Included
2 x Keys (Keys different on each padlocks)
1 x Padlock
We Provide
If you are not 100% satisfied with the quality of the product, simply reply to the shipping email that you will have received from us or reach us with your order number, and let us know about the issue. We will assist you within 24 hours