53pcs in 1 screwdriver set includes 42 insert bits，7 sleeves， 1pc rubber handle， 2pc extension rod and 1pc tweezery. Non-slip rubber design of handle for comfortable to operatey. Comes with extension rod can be inserted into the handle for length adjustmenty. It comes with plastic storage box for easy transporty. Please refer to picture for detailed types of insert bitsy. Made of sturdy steel with precision-machinedy.Screw head types: Sleeve: M2.5/M3.0/M3.5/M4.0/M4.5/M5.0/M5.5 Cross screw head: PH00(1.5)/PH00(2.0)/PH0/PH1/PH2 straight screw head: 1.3/1.5/2.0/2.5/3.0/3.5/4.0 Torx screw head: T3/T4/T5/T6/T7 Security torx screw head: T8/T9/T10/T15/T20 Star screw head: 0.8/1.5/2.0 Hex: H1.0/H1.5/H2.0/H2.5/H3.0/H3.5/H4.0 Triangle shaped: 2.0/2.3 /2.6 Tri-wing: 1.5/2.0/3.0 M screw head:PZ0，PZ1 U:U2.3Package included:1 x 53 in 1 Tool Set