Undersized a. : Of a size less than is common.

Example:
Who is the most Undersized NFL linebacker?

Taxonomy
Router Bits, shanks, Two flutes.

Defination from the web:
Undersized Router Bits - ROUTER BIT DIMENSIONS Two flutes, 1/4 or 1/2 shanks Item No. A B C D 1/4 SHANKS 90011 15/64 3 Plywood is usually is thinner than the...