The Union Tool Company No.100 is a "squirrel tail" block plane — a small plane with the distinctive round tail handle. It was produced as a lower-cost alternative to more common block planes.
Small cast iron body with the characteristic round tail. Simple construction for single-hand use.
Block plane for single-hand work. Suitable for chamfering, fitting and light trimming tasks.
This page documents the canonical Union Tool Company No.100.