Milwaukee 48-89-1110 14 Piece Black & Bronze Set Thunderbolt drill bits, in hard plastic case, are designed to give maximum performance to cordless drills. Product Description Sets - Drills Type: Drill Bit Kit Size Range: 1/16 - 3/8 Fractional Size: (2) 1/16, 5/64, 3/32, 7/64, (2) 1/8, 9/64, 5/32, 3/16, 7/32, 1/4, 5/16, 3/8 Material: HSS