The NO3 Pozi-type Impact Driver Bit is a purpose-designed screwdriver bit for driving Pozidriv (PZ) size 3 screws with impact drivers and impact-rated screwguns. Its primary use is to provide positive engagement and high torque transfer when fastening medium to large Pozidriv screws in timber and sheet materials, and wherever a PZ3 head is specified.

Manufactured from S2 tool steel and heat-treated for hardness and toughness, the bit is designed to withstand repeated shock loading from impact tools. The working tip is machined to Pozidriv geometry to ensure accurate fit with PZ3 fasteners; the shank is a 1/4 inch (6.35 mm) hex for compatibility with standard quick-change bit holders and impact chucks. The bit carries a black phosphate finish to give a degree of corrosion resistance and to reduce surface wear under demanding use.

Dimensionally the bit conforms to the common industry Pozidriv profile for tip size and angle, and the 1/4in hex shank follows the F-style quick-change interface used across DIN/ISO interchangeable bit systems (commonly referenced as DIN 3126 / ISO 1173 compatible). Thread type is not applicable to this component, as it is a driver bit rather than a fastener.

Typical applications for a PZ3 impact bit include structural and general carpentry, decking, roof and substructure assembly, joinery, plasterboard fixing and many mechanical and electrical installation tasks. The PZ3 size is commonly used with larger wood screws and decking screws, so trades such as carpentry, construction, flooring, timber-framing and general maintenance will find this bit particularly useful.

Key benefits include the S2 material’s high torsional strength and impact resistance compared with standard chrome vanadium bits, the Pozidriv tip geometry which reduces cam‑out and screw head damage, and the 1/4in hex shank which ensures rapid bit changes and broad compatibility with impact drivers and bit holders. The black phosphate finish adds basic corrosion protection and reduces galling in humid environments.

Duchy Fasteners stocks NO3 Pozi-type Impact Driver Bits in common lengths (25 mm and 50 mm) and pack quantities to suit trades and workshops — available individually and in multi-packs (5, 10 and 25 pieces). Product code DR35996 is supplied under the Draper Tools Group range.