Description 7 TurboMax Bits Sized 1/16' to 3/8' High performance metal drilling for portable drill users, works well on curved surfaces Revolutionary tip design stays sharper longer and drills up to 10x faster than other leading drill bits High speed steel features a black body and gold flute Self-centering TURBOMAX tip for clean entry and fast starts; stays sharp longer Plus 2 Uni-Bits: #1 fits 13 hole sizes (1/8? to 1/2?) #4 fits 12 hole sizes (3/16? to 7/8?) New SpeedPoint tip penetrates faster than previous Unibits and prevents walking Ideal for drilling holes into thin materials such as stainless steel, copper, brass, aluminum, plastic and laminates