What is a key characteristic of cotter pins?

Cotter pins, also known as split pins, are specifically designed to secure components in place, thereby preventing them from loosening during operation. This characteristic is essential in various mechanical applications where components need to be held together firmly, such as in fasteners or as part of a locking mechanism. When inserted into a pre-drilled hole and bent at both ends, cotter pins effectively create a secure connection that keeps components aligned and functioning as intended. This securing function distinguishes cotter pins from other tools or fasteners that may have different purposes, such as cutting or gripping.