Proto J5464 Socket Extension 1 2 in Input Drive Size, 1 2 in Output Drive Size, 20 in Overall Lg, Chrome 301701618 003 in Material Quality Standards 003 in Material Quality Standards ANSI Ring Sub Type Heavy Duty 2 Turn Material Grade Class 18 8 Ring Type Spiral Retaining Ring Manufacturer Location Made in USA* Location Style External Free I 60% Pulse Frequency 0 SAE AS4283C For Use With Proto Ratchet Sockets Number of Pieces 1 Features Heat Treated Output Drive Type Male Square Number of Points 4 Drive Type Female Square Locking No Input Drive Gender Female Non Sparking No Output Drive Shape Square Socket Extension Type Standard Output Drive Gender Male Insulated No Input Drive Shape Square this extension is durable and reliable for all your projects