The claw has two main things that can go wrong with it, and they call for different fixes. If it's leaking milk or losing vacuum around its internal seams but the housing itself looks physically fine, that's almost always a job for the Claw Gasket. If the claw top itself is cracked, chipped, or physically damaged — from a drop, from age and UV exposure, or from repeated handling — no gasket will fix that, because the problem is the structural housing, not the seal inside it.
The Claw Top is that structural housing — the rigid cover that all four teat cup lines connect into, along with the pulse tube and milk tube outlet. Replacing just the top rather than the entire claw assembly is usually the more economical fix when the housing is damaged but the rest of the claw (its base, internal mechanism) is still sound.