Dasqua 1.4-6" 0.0005" Combined range dial bore gage set. This set has the biggest measuring range in the industry. Resolution is 0.0005''. Depth is 6''. For close tolerance measurement of holes, taper and roundness. Supplied with carbide anvils. Extensions and washers for fine adjustment in sizes to select a specific range. Ergonomic design. Easy to read. Insulated cover. Chrome plated handles. Supplied in a fitted case.