A 6 mm router bit is a cutting tool used with a woodworking router, where the cutting diameter (or shank size, depending on context) is 6 millimeters. It is commonly used for shaping, trimming, and cutting grooves in wood, plastic, and sometimes soft metals.
Common types of 6 mm router bits
Straight bits – used for cutting straight grooves, dadoes, and mortises
Flush trim bits – used to trim edges flush with a template or surface
Round-over bits – create rounded edges on wood
Chamfer bits – cut angled edges for decorative or joining purposes
V-groove bits – make V-shaped grooves for lettering or decorative patterns
Flush pattern bits (bearing-guided) – follow a template for identical shapes