Vise adapted for mounting to a trailer receiver by its inner member

A vise for mounting to a trailer receiver of the type having a square socket, said vise comprising:

• an elongate inner member having a first end and a second end, said inner member having a hollow cross section having an outer wall surrounding a hollow inner lumen, said inner member having a longitudinal slot through said outer wall connecting to said inner lumen along at least a portion of the distance from said first end to said second end,
• a stationary jaw mounted on said first end of said inner member,
• a movable jaw slidably mounted on said inner member intermediate said first end and said second end,
• a threaded shaft disposed within said hollow inner lumen of said inner member, means for rotatably mounting said threaded shaft within said inner member, handle means for rotating said threaded shaft,
• a threaded means which engages said threaded shaft, said movable jaw being attached to said threaded means through said longitudinal slot,
• a square mounting extension attached to said second end of said inner member, said mounting extension being sized to be received in said socket of said trailer receiver, said mounting extension being insertable into said socket in four possible positions which are ninety degrees apart,
• and means for removably fastening said mounting extension within said socket, comprising:
• a first hole through said mounting extension, a second hole through said mounting extension, said second hole being at a right angle to said first hole,
• at least one corresponding hole through said socket.
• and a pin insertable through said hole in said socket and one of the holes in said mounting extension to removably fasten said mounting extension in one of said four possible positions within said socket.

In combination:

• a trailer receiver, said trailer receiver having a socket and means for attaching said trailer receiver to a vehicle,
• a vise, said vise having a square mounting extension attached thereto, said mounting extension being sized to be received in said socket, said mounting extension being insertable into said socket in four possible positions which are ninety degrees apart,
• and means for removably fastening said mounting extension within said socket, comprising:
• a first hole through said mounting extension, a second hole through said mounting extension, said second hole being at a right angle to said first hole,
• at least one corresponding hole through said socket,
• and a pin insertable through said hole in said socket and one of the holes in said mounting extension to removably fasten said mounting extension in one of said four possible positions within said socket.