Wheelbarrow

A wheelbarrow was an essential tool for Westley's plan of bypassing the sixty guards at the castle gates, by dressing Fezzik as the Dread Pirate Roberts and lighting his holocaust cloak. The already giant Fezzik looked even taller when standing on the wheelbarrow, pushed by Inigo.

When formulating the plan, Westley had nearly given up when he found out that a wheelbarrow was available, and slightly scolded Fezzik for not listing it among their assets in the first place.