Albrecht Alpine-SeriesOur Roller Rock Bits dispose of patented bearing and sealing systems which extents live-time of bit. Leg is completely protected with 3/3 Tungstan Carbide Inserts. Furthermore, edges of leg have a Wolframcarbide protection. We can offer you following IADC-Codes: 547, 637, 737, 837. On customer request, we can also produce different sizes and IADC-Codes.