Proto J5464 Socket Extension 1 2 in Input Drive Size, 1 2 in Output Drive Size, 20 in Overall Lg, Chrome 301701618 UNS SAE or Metric SAE 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 4 in 28 making it compatible with a variety of tools This Proto J5464 Socket Extension is designed with a 1 2 in input drive size and a 1 2 in output drive size