1) Inspects and tests metal cans for imperfections, using scaler and measuring devices: Pulls samples of tinplate or aluminum sheeting can bodies and ends from production lines, and inspects them for surface flaws in metal, defective seams, and machining defects, such as scratches, burrs, and dents.2) Measures sample, using micrometer or gauges, to verify dimensions.3) Records results of inspection in log for each machine.4) Stops production line when inspection reveals need for corrective maintenance.7) Disassembles and flattens cans or lids, using handpress and cutters8) Measures flanges, hooks, seams, curls, countersinks, beads, and inside and outside dimensions of cans, using dial gauges.