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. This set has the biggest measuring range in the industry. Ergonomic design. Easy to read. Insulated cover. Chrome plated handles.