5209 HSS conical drill bit set, 3-30.5 mm, plastic case.

HSS conical sheet-metal drill bit set Contents: 1 each of 3-14/8-20/16-30.5-mm drill bits, with drilling paste.

Tenifer-treated for surface hardening through reduced cold welding. Burr-free drilling and reaming of metal sheets, pipes, steel profiles, Cr-Ni steel, non-ferrous metal, acrylic glass and plastic up to a wall thickness of 5 mm. The hole diameters are signed by laser in both grooves. The scale is legible when the tool is rotating. The three-sided tappet shank prevents "slipping" in the drill chuck.