These Profile Projector (KW-800) is an optical instrument that can be used for measuring. It is a useful item in a small parts machine shop or production line for the quality control inspection team.The projector magnifies the profile of the specimen, and displays this on the built-in projection screen. On this screen there is typically a grid that can be rotated 360 degrees so the X-Y axis of the screen can be aligned with a straight edge of the machined part to examine or measure.ALMICRO PROFILE PROJECTOR (KW-800)Having 200mm dia rotatable screen with vernier reading of 1 minute scale. Halogen bulb (12v 100w) with solid state variable light control built in transformer workable on 220V AC main. Stage X-Y movement on ball bearing slides. Having Micrometer (50mm dia) L.C.01 or 0.005mm fixed magnification 10x or 20x.. Having transmitted light in card board box.