Product Description The Depth Gauge Micrometer is highly accurate to a strictly minimal variance. For your confidence, it has undergone rigorous testing to guarantee consistent precision and quality. With anvils made of tungsten carbide, the micrometer is resistant to corrosion. Key Features - Interchangeable rods enable wide-range measurement - Ground hardened depth gauge base for accurate location onto datum surface - Measuring rod lock - Flat measuring face - Ratchet Stop provides a constant measuring force - House in a fitted case with adjustment spanner - No batteries required Specification -Mechanical Depth Gauge Micrometer -Range: 0-4"; Graduation: 0.001"; Comply with Standard: BS 870 -Base length: 101.5mm or 4"