SE - Screwdriver Set - Precision, 21 Pc - 749SD SE Professional Quality 21 Pc Precision Screwdriver Set Includes Nut Driver Sizes: 3mm, 3.5mm, 4mm, 4.5mm, 5mm Wrenches Sizes: 4, 4.5, 5, 5.5 & 6. Hex Key Sizes: 1.5, 2, 2.5, Philips 0#, 1# Slotted Sizes: 0.1mm, 1.4mm, 2.0mm, 2.4mm, 3.0mm, 3.8mm