The 20530 is for 10mm thread adapter. 10mm Spark Plug Adapter for Compression Tester. 10mm Spark Plug Adapters for 20250 Compression Tester.
Lisle 20530 10Mm Spark Plug Adapter
Lisle 33920 10mm Socket Hex Bit
Owatonna Tool Co. OTC 14mm 10mm Spark Plug Hole Thread Chaser M-1014 VTG USA
12x Helicoil 10mm Spark Plug Thread Repair Inserts #R474-4 M10x1.0mm 1/2" Reach
Lisle 3-pc Spark Plug and Oxygen Sensor Chaser Set, automotive tools, O2 thread
Lisle 20580 InLine Spark Tester w/ Coil On Plug Wire
