Used to adjust tappets, spark plugs, distributor points, checking bearing clearances and gear play, fitting pistons, rings and pins and gauging narrow slots. Leaves are tempered steel, easily removed and replaced. Locking device on all sets. Inch Reading Gauges with Tapered leaves 1/2-1.4 x 1 1/32 in No. of leaves: 26 Range: 0.0015 - 0.025 in (0.0015, 0.002, 0.0025, 0.003 to 0.025 by 0.001 in steps).