Proto J5464 Socket Extension 1 2 in Input Drive Size, 1 2 in Output Drive Size, 20 in Overall Lg, Chrome 301701618 Phase Rotation Features Durable Rubber Phase Rotation Features Durable Rubber Casing UNS SAE or Metric SAE Secondary Material Application Stainless Steel Die Finish Bright (Uncoated) Extension Tap No Features Self Alignment Finish Machining Bright (Uncoated) Tap Type Hand Tap Case Type Metal Coolant Fed Non Coolant Through Die Material High Speed Steel Powdered Metal Base Material No Tap Shank Standard Table 302 Die Material Grade Carbon Steel Number of Dies in Set 10 Secondary Material Application ISO Code M Measurement System Fractional Inch Class of Fit 2B Primary Material Application All Materials Material Machining High Speed Steel Threads per Inch 8 SAE or Metric SAE Finish Chrome Item Locking Extension Standards ASME B107 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