Product description 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 straight leaves 12 x 3 132 in no of leaves 26 range 00015 0025 in 00015 0002 00025 and 0003 to 0025 by 0001 in stepsthe ls starrett company founded in 1880 manufactures industrial professional and consumer products which include precision tools tape measures levels electronic gauges dial indicators gauge blocks digital readout measuring tools granite surface plates optical projectors vision systems coordinate measuring machines vices m1 lubricant hacksaw blades hole saws band saw blades circular saw blades jig and reciprocating saw blades and ground flat stock in recent years there have been numerous acquisitions and product line expansions in many categories