Used by draftsmen, designers and Quality Control inspectors, Fowler's pocket-sized Micro-Surface Scales measure 1" x 5/8" and weigh only 3 oz. (70g).
Enables user to obtain best results when assessing roughness by sight and touch. Plates marked with 'N' numbers, micrometers and micro inches Ra and Rz
Range provides standards for the seven most frequently used machining processes. AA values in micro inches and microns.
Tactile comparison, using a clean fingernail with moderate pressure, provides the best means of surface roughness assessment. (Slightest speck of dust acts as an abrasive.)
For certain surfaces, tactile comparison may be supplemented with visual comparison by using a 7 x or 10 x magnifier.
Includes protective wallet and instruction cards.
New - Open Box Item: Excellent condition. Original protective wrapping or bag may be missing or open. Packaging, box and/or case is intact but may have slight markings (please see photos). No signs of wear on the item.