Drill America GLBCOX613/32 13/32" x 6" Cobalt Aircraft Extension Drill Bit, GLBCOX613/32Drill America GLBCOX613 32 13 32" x 6" Cobalt Aircraft Extension Drill Bit, GLBCOX613 32 Manufactured to Aerospace Standard 907. Ideal where extra length for reach is required. These drill bits display high red hardness, permitting speeds up to 30% greater than with conventional M2 high speed steel, and are especially effective in drilling tough, high tensile strength materials like stainless steel, inconel, and titanium. The 135 split point is self