Quick view Wishlist Alpha Alpha 25 Piece Cobalt Drill Bit Set $495.00 Alpha Slim box 25 Piece Reduced Shank Drill Set. Alpha Cobalt Drills. Sizes 1mm 1.5mm 2mm 2.5mm 3mm 3.5mm 4mm 4.5mm 5mm 5.5mm 6mm 6.5mm 7mm 7.5mm 8mm 8.5mm 9mm 9.5mm 10mm 10.5mm 11mm 11.5mm 12mm 12.5mm 13mm Add to Cart Compare