UNC Thread Chase set (National Coarse). Dies - 1/4"-20, 5/16"-18, 3/8"-16, 7/16"-14, 1/2"-13, 9/16"-12, 5/8"-11.
14mm Back Tap Spark Plug Thread Repair Tool M14x1.25 Thread Chase Tap
49PC Thread Repair Chaser Kit UNC UNF Metric Thread Restorer Tap and Die Tool
49PCS Thread Repair Chaser Tool UNC UNF Metric Thread Restorer Tap and Die Kit
49x Thread Repair Chaser Kit UNC UNF Metric Thread Restorer Tap and Die Tool Set
