A XCET170404 indexable insert with a 0.4mm corner radius, ground to mount in a compatible chamfer mill body and produce an angled edge break rather than a rounded corner.Key specs ISO insert code: XCET170404 Material: Carbide Corner radius: 0.4mm Compatibility / fitmentFits indexable chamfer mill bodies matching the insert's ISO code.Application / use caseUsed as a replacement or spare edge for an indexable chamfer mill body once the cutting edge dulls or chips, letting the pocketed body keep working without buying a new tool. The 0.4mm corner radius takes some of the sharpness off the tip, giving a slightly more durable edge for deburring and edge-breaking machined parts than a dead-sharp insert, while still cutting a flat angled face rather than a rounded corner profile.