The 45-in-1 handy precision maintenance tool screwdrivers set is a good size with a useful range of screwdriver bits. The tool set includes 1 x handle 1 x extension stick 1 x spring tube 42 x screwdriver tips. This is great for working on electronic devices with small screws. This screwdriver set is with magnetic holds bits securely. With one toolkit you can loosen and fasten many small screws in the electronic devices. - Model: BT-8913 - Material: Chrome-vanadium steel (6150#) - Includes: 1 x handle + 1 x extension stick + 1 x spring tube + 42 x screwdriver tips - Screwdriver tips includes: - M2.5/M3.0/M3.5/M4.0/M4.5/M5.0/M5.5 inner hex screwdriver - PH00/PH0/PH1.0/PH2.0 phillips screwdriver - 1.3/1.5/2.0/2.5/3.0/4.0 slot screwdriver - T4/T5/T6/T7/T8/T10/T15/T20 torx screwdriver - 1.5/2.0 pentalobe screwdriver - H1.0/H1.5/H2.0/H2.5/H3.0/H3.5/H4.0 hex screwdriver - 2.0/2.3 triangular recess screwdriver - Y1.5/Y2.0 tri-wing screwdriver - PZ0/PZ1 cross screwdriver - 2.3 spanner screwdriver - 1.0 awl