30 in 1 Portable Precision Electronic Screw Driver Set for Dell laptop 30 in 1 Portable Precision Electronic Screwdriver Set. Multi-purpose Electronic Screwdriver Set is ideal for home shop and work place. Rubber wrapped plastic handle features sturdy metal chuck to keep the adapter shaft in place. Magnetic bits is easy and tight to adsorb into the adapter shaft. This 30 in 1 Screwdriver Set contains 1 screwdriver handle 1 screwdriver adapter shaft and 30 pieces screwdriver bits ( T4 T5 T6 T7 T8 T10 T15 T20 H1.0 H1.5 H2.0 H2.5 H3.0 H4.0 Star 4.0 PH00 PH0 PH1 PH2 Slotted 1.3 Slotted 1.5 Slotted 2.0 Slotted 2.5 Slotted 3.0 Triangle 2.3 Tri-Wing 3.0 U 2.3 etc).