hss tool bit, material: m2 or w9 : (1) round tool bit; ( 1/16 to 1 ),(1.1 x 26mm) (2) square tool bit; (1/8 to 2 ),(3 to 50mm) (3) rectangle tool bit; (1/4 x3/16 to 2 x1 ),(6x5mm to 50x 38mm) carbide brazed tool bits: din & iso standard din4971-iso1 din4972-iso2 din4973-iso8 din4974-iso9 din4975-iso10 din4976-iso4 din4977-iso5 din4978-iso3 din4980-iso6 din4981-iso7 din282-60° - iso12 din283-60° - iso13 din263 - iso11 america standard styles:ar&al styles:br&bl styles:c styles:d styles:e style ct styles:gr&gl