DEWALT BLACK&GOLD HSS Drill Bits have a speed tip and a tough core for increased durability. The bits also incorporate a no-spin shank that eliminates the frustration of the bit spinning in the chuck. Supplied in a TOUGH CASE+, this is part of a connectable case system that is TSTAK™ compatible. Individual TOUGH CASES can be clipped together for easy transportation. This 19 piece set contains the following sizes: 1, 1.5, 2(x2), 2.5(x2), 3(x2), 3.5(x2), 4(x2), 5(x2), 5.5, 6, 7, 8 and 10mm. Ref: UTTK7121