screwdriver bits

Common materials listed in these kits are S2 steel and CR‑V (chromium‑vanadium) for screwdriver bits and sockets, and HSS (high‑speed steel) or carbon steel for drill bits.

Larger kits often include accessories such as bit holders and quick‑change adapters, extension rods, countersink drills, hole saws with arbor adapters, nut‑driver bits, hex wrenches, and drill bit stoppers.

Kits commonly list rust‑resistant or protective finishes such as blackened phosphate coatings and electroplating; some descriptions simply note ‘corrosion‑protected’ components.

Many kits highlight magnetic features: bits or handles may have magnetic tips, and larger sets often include magnetic bit holders or magnetic quick‑change components to hold screws and speed bit swaps.

Common head types include slotted (flat), Phillips, Torx, hex (Allen), and square bits. Some kits also include hex nut sockets and tamper‑proof 5‑point (pentalobe) security bits.

Most kits use a portable case with labeled or dedicated slots; some include removable organizer strips. Compact multi‑bit screwdrivers store bits in the handle, while small security sets use a sleeve or small case.

One listing shows pentalobe sizes IP10 (2.74 mm), IP15 (3.27 mm), IP20 (3.86 mm), IP25 (4.43 mm), IP27 (4.99 mm), IP30 (5.52 mm), IP40 (6.65 mm), IP45 (7.82 mm), and IP50 (8.83 mm); a related listing shows equivalent T10–T50 labels with the matching millimeter values.