Our master mechanic shop set contains 8 steel cut burrs w/2” shank & 4 steel cut burrs w/6” shank and the same for aluminum for a total of 24 pieces and feature solid carbide construction -- from the tip of the head to the bottom of ¼” shank. 2” shanks sizes include: (SA, SB, SC, SD, SE, SF, SG, & SH) & 6” shanks sizes include SC, SF, SE, & SC (individual sizes available, CALL FOR PRICING 844-REAPER-3)