Pass Thru Socket Set

socket set
A socket wrench, more commonly referred to as a ratchet, is a type of wrench, or tightening tool, that uses separate, removable sockets to fit many different sizes of fittings and fasteners, most commonly nuts and bolts.
A number of detachable sockets of different sizes for use with a socket wrench

pass thru
Small air lock that allows you to pass product in or out of a cleanroom.
Starting formation - facing dancers. Dancers move forward, passing right shoulders with each other. Each ends in the other's starting position, but neither dancer changes facing direction.
Single Hung window without a main frame sill; has a cap piece with foam that fits onto the sash sill.