... than 15years experience in this line. 1.The Material for Hss Drill Bits have Hss4241,Hss4341,Hss9341,Hss6542,Hss M35 and Hss ... M42.2.The Standard of Hss Drill Bits have Din1897,Din338,Din3402.The Degree of the Hss Drill ... Black Finished,Bright Finished,Titanium.4.The Packing for Hss Drill Bits have Plastic box and Skin card.5.We can produce ...