Each micrometer is equipped with a series of interchangeable anvils. Each anvil is marked to show its capacity and is fitted with an adjustable collar to prevent wear. Graduated in 0.01 mm increments.

Micrometer outside in case	0-100mm
Micrometer outside in case	100-200mm
Micrometer outside in case	200-300mm
Micrometer outside in case	300-400mm
Micrometer outside in case	400-500mm