A quality range of precision screwdrivers. Combination tool and driver sets have carbon steel blades (tweezers are stainless steel). Driver only sets have nickel chrome molybdenum alloy steel blades. All with attractive chromed handles. 5-Piece Hexagon Key Driver Set (-9886K) Contents: Hexagon: 0.9, 1.3, 1.5, 2.0 and 2.5mm. 5-Piece Hexagon Ball Key Driver Set (-9887K) Contents: Hexagon Ball: 1.3, 1.5, 2.0, 2.5 and 3.0mm. 5-Piece Nut Driver Set (-9888K) Contents: Hexagon: 3.0, 3.5, 4.0, 4.5 and 5.0mm.