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The WIHA 28574 is an IP8 Torx Plus insert bit designed for use with standard power and hand bit drivers. It features a Torx Plus end profile, which provides a tighter fit in IP8 fastener sockets compared to standard Torx profiles, reducing cam-out and extending the life of both the bit and the fastener. The steel construction delivers the toughness needed for repetitive use in assembly, maintenance, and service applications. At 175 millimeters overall length, it is suited for driver handles and power tool bit holders that accept standard insert bits. Electricians, HVAC technicians, and equipment service professionals keep IP8 bits on hand for panel access screws and specialty fasteners.
The WIHA 28574 fits into applications where IP8 Torx Plus fasteners are specified, including electronic enclosures, control panels, and mechanical assemblies that use tamper-resistant or precision-fit IP-series hardware. It is a single-piece insert bit sold individually, making it straightforward to stock as a replacement or to add specific sizes to an existing bit set. Trade professionals in HVAC, electrical, and light mechanical service will find this size relevant for equipment covers and proprietary fastener configurations encountered in the field.
Designed as an OEM-style insert bit replacement compatible with standard bit driver handles and power tool chucks that accept insert-style screwdriver bits in the Torx Plus IP8 size.
Insert bits should be seated fully in the driver holder before applying torque to avoid slipping or fastener damage. Inspect the bit tip for wear or deformation before each use, particularly in high-cycle applications. No special tools or trade licensing are required for bit replacement, though the fasteners this bit drives may be located inside energized panels or equipment that must be de-energized and locked out before service per applicable electrical codes.
We pulled together the parts most installs need for this unit, plus a few add-ons worth a look. Check what you need — nothing here blocks checkout.
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