The Stanley FatMax 0-65-339 is a PZ4 Pozidriv screwdriver for heavy-duty industrial fixings. PZ4 is the largest Pozidriv size and appears in heavy construction hardware, large industrial enclosures, and specialist commercial fittings. The Pozidriv design provides better cam-out resistance than Phillips at a given size, and at PZ4 this matters because the torque levels involved are substantial.

The 200mm chrome vanadium steel blade is hardened and tempered to handle the forces required by PZ4 fasteners. The tip is precision machined with the Pozidriv cross-point pattern and the additional smaller cross slots that distinguish Pozidriv from Phillips. This geometry locks into the fastener recess and resists the outward force that causes cam-out, allowing the driver to transfer more torque to the fastener before the tip begins to slip.

The FatMax bi-material handle is sized to match the blade, giving a generous palm contact area for the high forces this driver is designed to transmit. The soft grip layer provides traction in oily or wet conditions, while the rigid inner section maintains handle-to-blade alignment under load. The handle material resists acetone, solvents, and other common trade chemicals.

Key Specifications: Type: Pozidriv. Tip Size: PZ4. Blade Length: 200mm. Material: Chrome vanadium steel. Handle: Bi-material, chemical resistant. Model: 0-65-339. Weight: 0.236kg. Dimensions: 313 x 41 x 52mm.