Spark Plug Gap Gauge Tool Type 12-Blade Feeler Gauge with 6-Wire Spark Plug Gap Gauge Set Length 3 5/16 in Width 1 in Height 1 21/64 in Capacity 0.010 in to 0.045 in Material Steel For Vehicle Tool Category Engine Color Silver Includes Double-Ended Electrode Tool Number of Pieces 18 Application Used with Standard Ignition Systems For Use With Standard Ignition Systems Set and Measure Spark Plug Gaps Plus Other Ignition Clearances