Vintage Proto 5863 Heavy Duty 1” Drive Extension 16-1/2" Long Made in USA
In good used condition. Minor signs of wear and use. Will ship either USPS Ground or UPS Ground.
This extension was from the Plomb Company sometime in the 1950s and made in Los Angeles. The following information comes from the PROTO catalog in 1954: "Made from PROTOLOY special alloy steels. They are scientifically heat treated to provide great strength and toughness ... 1" square connections. Extension with a 1" hole in female end for turning with a 5884 bar ... Friction ball holds bar firmly at any point ... PROTO means PROfessional TOols".