M3 HSS DIN 352 Hand Tap is made from high-quality steel that is drop forged so as to offer maximum strength for heavy duty work It is exceptionally durable and corrosion resistant as well This tool comes in handy when you need to tap threads or blind holes into machines The tool has a high penetration capacity for ease of working with alloys and structural steels This hand tap makes for a convenient tool for heavy duty workers, mechanics and DIY enthusiasts