The choice of different insert concepts.

Negative, double/single-sided inserts.

 - A negative insert has a wedge angle of 90° seen in a cross-section of the basic shape of the cutting edge.

 - Available as double/single-sided inserts with P-hole or plain.

Positive, single-sided inserts

 - A positive insert has a wedge angle less than 90°.

- Available with 7° or 11° clear-ance angle.

 - The positive iLock^TM inserts have a clearance angle of 5° or 7°.

Chip forming at high pressure and temperatures

The choice of cutting material and grade is critical for success.

The ideal cutting tool material should:
 - be hard to resist flank wear and deformation.
 - be tough to resist bulk breakage.
 - not chemically interact with the workpiece materia.
 - be chemically stable to resist oxidation and diffusion.
 - have good resistance to sudden thermal changes.