Housed in a convenient blow mold storage case Accuracy within + or -3% Guaranted to meet or exceed federal spec #GGW-00686 CR-MO steel ratchet gears for long life All parts, including shaft, are heat treated, carbonized quenched and twice tempered for long life and accurate performance Nickel and chrome plated sandblasted shaft to reduce metal fatigue Metric scale included Warranty on calibrations: 90 days Length: 18.25 .