General 454-6 Caliper, 0 to 6-1/2 in, 6-1/2 in Jaw, Steel

For gauging inner diameters and transferring measurements to a ruler. Hardened and tempered bow springs assure uniform tension without side play. Adjusting screw has self-seating washer and nut for quick adjustments. Legs made from special caliper steel with hardened measurement points. Conforms to government specifications GGG-C-95.