What type of wrench is available as individual units, sets, or T-handles?

The hex key wrench, also known as an Allen key, is available in a variety of configurations, including individual units, sets, and T-handles. It is designed to drive fasteners that have hexagonal recesses in their heads, commonly found in furniture assembly and bike components. The availability in different forms enhances its versatility, as individuals can choose the most suitable option for their specific needs. The T-handle variant provides better grip and torque, which can be beneficial in tight spaces or when applying significant force.

The other types of wrenches listed, while useful for their specific applications, do not typically come in the same format. Striking wrenches are generally designed for heavy-duty applications and aren't usually sold in sets. Spanner wrenches are specialized tools often used to tighten or loosen nuts and bolts with a specific shape and are also less common in sets. Socket wrenches come as a set featuring various sizes of sockets, but they do not include the T-handle design associated with hex key wrenches.