ASTME-384/92 compliant. -MODEL # MAHT-10 -Kgf = 0.3, 0.5, 1, 2, 2.5, 3, 5, 10 -N = 2.94, 4.9, 9.8, 19.6, 24.5, 29.4, 49.0, 98.0 -Testing Range = 8HV0.3~2900HV10. MODEL # MAHT-30 -Kgf = 0.5, 1, 2, 3, 5, 10, 20, 30 -N = 4.9, 9.8, 19.6, 29.4, 49, 98, 196, 294 -Testing Range = 8HV0.5~2900HV30. MODEL # MAHT-50 -Kgf = 1, 2,3, 5, 10, 20, 30, 50 -N = 9.8, 19.6, 29.4, 49.0, 98.0, 196, 294, 490 -Testing Range = 8HV1~2900HV50 -LCD displays -10x and 20x objective -Auto Turrent -Digital 10x eyepiece -Auto load, dwell and unload