Where should you check for wear and tear on mechanical ascenders?

When inspecting mechanical ascenders for wear and tear, it is crucial to examine the cams, shell, and pin hole area because these components are critical to the device's functionality and safety. The cams are responsible for gripping the rope during ascent, and any wear in this area can significantly impair their ability to hold securely, leading to potential falls or failures. The shell protects the internal mechanics but can also be susceptible to damage, which could affect the operation of the ascender. Additionally, the pin hole area is where the components pivot and interact; wear here can lead to alignment issues that affect performance. Regular and thorough checks in these areas ensure that the ascender remains reliable and safe for use during rescue operations or climbing.