A screw bit (or screwdriver bit) is a removable tool tip for driving/loosening screws, used with hand drivers, power drills, or impact drivers .
1. Common Types & Applications Slotted (Flat/S)
Straight blade; for single-groove screws. Low torque, easy to slip. Best for old furniture, low-stress tasks.
2.Standard Sizes (Most Used)
Phillips: PH0 (electronics), PH1 (fixtures), PH2 (general), PH3 (heavy duty).
Pozidriv: PZ0, PZ1, PZ2, PZ3.
Materials & Quality
S2 Tool Steel: Professional grade; HRC 58 to 62, shock resistant, for impact drivers.
High-Carbon Steel: Low cost, prone to rust; for light, occasional use
1/4" Hex Shank: Universal for drills/drivers; standard size.
Lengths: 25mm (short), 50mm (standard), 75 150mm (long, for deep reach).
Match bit to screw head (type + size) to avoid stripping
Magnetic bits hold screws for one-handed work
Impact-rated bits have reinforced shanks for power tools
Hex: 1.5mm to 10mm; common: 3mm, 4mm, 5mm, 6mm