Item No.: H37H519
. Size: 1/4" (6mmx6cm)  
. " A-Z letters and 0-9 numbers in heavy-duty steel punches
. You can mark your valuables permanently"  
. "Note:Designed for hobbyists or jewelers to customize their handiwork
. Letter A-Z, & (ampersand), and 0-8 (9 is upside-down 6)
. . Storage case included"  
. Texture of material ：45# steel, surface blackening, hardness: 45-50 degrees   
. surface treatment ：Black   
. Product heat treatment