A set of 4 Pin Punches containing one each of 1/8 (3 mm) 5/32 (4 mm) 3/16 (5 mm) & 1/4 (6 mm) packed in a vinyl pouch. Pin Punches 4 (100 mm) long: Single Piece Construction with 1 (25mm) Long Pin These round shank pin punches have clean and well cut knurling which provides positive non slip grip. Rust inhibiting black oxide finish.