This is a NO4 Pozi‑hex screwdriver bit, 38mm long, designed to drive Pozidriv timber screws in joinery and general woodworking applications. Its primary use is in power tool driving — compatible with 1/4" hex chucks and quick‑change bit holders — where a PZ4 tip is required for medium to heavy timber fixings and cabinetry screws.

The bit is manufactured from S2 tool steel and is heat treated to provide a durable tip that resists wear; typical hardness is in the mid‑to‑high HRC range for long life under repeated impact. The surface is given a black phosphate finish to improve corrosion resistance and reduce galling when used in damp or exposed conditions. The 1/4" hex shank is produced to DIN 3126 / ISO 1173 dimensions for secure retention in standard bit holders and quick‑change chucks. Thread type is not applicable for a screwdriver bit; head type is Pozidriv (PZ4) and drive type is the Pozi‑hex arrangement — a Pozidriv tip combined with a 1/4" hex shank for power tool use.

Typical applications include decking, joist and stud fixings, roof battens, sub‑flooring and furniture assembly, plus any timber or chipboard work that uses Pozidriv screws. The bit is suitable for use with cordless drills, impact drivers and multi‑drivers used by carpenters, joiners, timber frame contractors and general building trades. It is also useful in workshop and DIY settings where Pozidriv screws are specified.

Key benefits are reliable Pozidriv engagement that reduces cam‑out compared with plain cross tips, S2 tool steel strength for impact resistance, and a corrosion‑resistant phosphate finish for longer service life on site. The 38mm length offers a balance of reach and control in powered driving, while the standard 1/4" hex shank ensures compatibility with the vast majority of power tool accessories.

Duchy Fasteners stocks a wide range of screwdriver bits including Pozi sizes NO1 to NO4, multiple lengths and both individual and multi‑pack options to suit trade and retail requirements. If you need different lengths, drives or packs, contact us for availability.