Defence Oil ZX -1 ewn fine boring head 53-95 mm With a magnetic base

With a magnetic base

There are many Chinese brands also making the same inserts so you can just check the description of the size from other brands to fix this insert

CCMT BORING BAR OTHER EDGE AND NORMAL EDGE

Increases fuel efficiency and engine longevity

Used in precision instruments and fine mechanical assemblies

Defence Oil ZX -1 ewn fine boring head 53-95 mm With a magnetic baseApplications of Defence Oil ZX 1 5L Designed for use in military engines, gearboxes, and transmission systems. Offers excellent lubrication under high pressure and extreme temperature conditions. Reduces wear and friction in heavy duty mechanical components. Maintains viscosity stability for consistent performance during long operations. Acts as a rust preventive by forming a protective film on metal surfaces. Protects stored machinery, weapons, and