66 in 1 Precision Electric Screwdriver Set (with Built-in 350mah lithium battery)

Electric screwdriver bits are made of S2 Steel, sturdy hardened construction, wear resistance, and corrosion resistance.Nut Drivers pen-shaped body is ergonomically designed and easy to grasp.Cordless screwdriver ABS case lightweight design easy to use, no fatigue over long periods of use. Tightly into without hurting screw Nut Drivers!