Slugging Wrench: A very strong wrench designed to be hit with a hammer to deliver high impact force to a nut or bolt. This lets you loosen or tighten fasteners that are very tight, seized, or large — beyond what a normal wrench can do.
Castellated Design: The term castellated refers to a notched or slotted profile on the wrench or socket head (like the turrets on a castle). This design allows the tool to fit over special nuts with slots or grooves — often those requiring alignment for a cotter pin or safety wire.
Socket: A socket is the removable part that fits over the head of a bolt or nut; in this case, the socket also has a castellated (notched) design so it mates with the matching fastener shape
