The top tool for cleaning up shallow mortises and hinge insets.
Springloaded Corner Chisel - A 3/8' spring-return chisel for squaring hinge mortises. Tap it and it re-sets instantly for the next corner. A sturdy production tool. USA model (#25479) made by Whiteside. Import model (#91494, not shown) is from Taiwan.
See also: Sorby Corner Chisel (#66884)