Gar M-163 | 63 Microinch Roughness Three Specimen Comparator Grinding Turn or Shape Milling Methods

Individual rectangular block (measuring 1 3/8" x 1 7/8") with three panels for different machining methods. It is made of corrosion resistant electroformed nickel that is a duplicate of actual conventionally machined surfaces. The M163 has a roughness average of 63 and the machining method is grinding, turn or shape and milling with periphery.

Features:

• Roughness scale for inspection
• Three block specimen
• 63 Microinch roughness
• Machining methods: Grinding, turn or shape, milling
• Genuine leather sleeve