Starrett can seam micrometers are used to inspect and measure the depth and thickness of steel, aluminium and aerosol can seams. These micrometers feature an advanced sleeve design with distinct figures & staggered lines for precise & easy readability. They are integrated with friction thimbles providing single-hand operation & uniform contact pressure. They are coated with no-glare satin chrome finish to reduce annoying surface glare under bright UV lights.