Rottefella is a Norwegian manufacturing company of winter sports equipment,
more specifically ski bindings.[1] The name "Rottefella" refers to the  three-pin
binding invented by Bror With in 1927, inspired on a couple of rat traps
he had seen in a hardware store.
The binding were more formally known as the "75mm Nordic Norm".
The binding was the standard for cross-country skiing for decades.
 Rottefella also produces one of the two systems that have largely [3]
replaced the 75mm, the New Nordic Norm.