I don't think you are going to find the answer on his site, you should rephrase the question. A karabiner is a gun, and I don't think this question has anything to do with a gun.
This product is rated by its manufacturer as supporting a maximum weight of 40 pounds.
The amount of weight a pulley can hold depends on its design, materials, and construction. Typically, pulleys are rated to hold loads ranging from a few pounds to several tons. It is important to check the manufacturer's specifications to ensure that a pulley is being used within its weight capacity to prevent damage or failure.
It will be printed with how much weight it can handle on the side of the bar.
112lbs
it can hold as much weight as it can handle
A Command Strip can typically hold up to 7.5 pounds of weight.
it can hold up to 2 gallons
Paper can hold exactly 4.5 kg
Gorilla Super Glue can hold up to 30 pounds of weight.
The Golden Gate Bridge can hold up to 38,000 tons of weight.
90lbs
120 pounds