This is a Mitutoyo V-Block and clamp set, specifically model code 181-904. These precision tools are used in machining and inspection to securely position round or cylindrical parts for accurate measurements.
Key specifications and features include:
Brand: Mitutoyo
Model Code: 181-904
Material: Hardened steel, precision ground
Function: Used for holding cylindrical workpieces during layout, machining, or inspection
V-angle: 90° clamping brackets