18 Piece Tap and Drill Bit Set. Sizes m2 - m12 in Metal Case. Includes sizes:m2.5 x 0.45 Tap and 2.05mm Drill Bitm3.0 x 0.50 Tap and 2.50mm Drill Bitm3.5 x 0.60 Tap and 2.90mm Drill Bitm4.0 x 0.70 Tap and 3.30mm Drill Bitm5.0 x 0.80 Tap and 4.20mm Drill Bitm6.0 x 1.00 Tap and 5.00mm Drill Bitm8.0 x 1.25 Tap and 6.70mm Drill Bitm10.0 x 1.50 Tap and 8.50mm Drill Bitm12.0 x 1.75 Tap and 10.20mm Drill Bit Drill Bit Information: A dependable, general purpose drill designed to perform in a broad range of materials in the iron and steel families. Ideal for production, maintenance or portable drilling jobs. Surface treated with abrasion-resistant black oxide. Tap Information: Hand Taps are the most versatile taps for hand use, or for tapping under power. Hand taps are popular for use in general machine tapping or CNC tapping. They are also appropriate for tapping the vast majority of materials in through or blind holed conditions. Plug Style: Generally used in thru holes.