Size:1-Pack A must-have for hanging doors, thisspring loaded corner chisel is more efficient than a hand chisel, and worksquickly to ensure that corners are perfectly square. Compact enough to carryin your pocket, with a 3/8-inch cutter edge, this handy tool creates a 90degree square corner when simply placed on any corner and tapped with ahammer. And because the Porter-Cable 42234 Corner Chisel self-aligns, accuracyis never an issue; you get the right fit every time with minimal maneuvering. A must-have for hanging doors, this spring loaded corner chisel ismore efficient than a hand chisel, and works quickly to ensure that cornersare perfectly square. Compact enough to carry in your pocket, with a 3/8-inchcutter edge, this handy tool creates a 90 degree square corner when simplyplaced on any corner and tapped with a hammer. And because the Porter-Cable42234 Corner Chisel self-aligns, accuracy is never an issue; you get the rightfit every time with minimal maneuvering.