Features and Benefits: Used to scribe lines in metal before cutting or riveting; Sharper angle specifically designed to scribe lines in metal; Made of alloy steel for hardness and durability; Black oxide finish prevents corrosion and rust; American made product; The Mayhew 60007 Center Punch Kit, 7-Piece, includes: 24000 1/4-Inch Black Oxide Center Punch; 24001 5/16-Inch Black Oxide Center Punch; 24002 3/8-Inch Black Oxide Center Punch; 24005 1/4-Inch Black Oxide Center Punch 1/16 Pt; 24006 1/4-Inch Black Oxide Center Punch 5/64 Pt; 24007 5/16-Inch Black Oxide Center Punch 1/8 Pt; 24008 7/16-Inch Black Oxide Center Punch 1/4 Pt; Set comes in a pouch.