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The WIHA 28577 is a Torx Plus insert bit designed for fastening and removal of IP15 Torx Plus fasteners in professional trade and service applications. Built from steel, this bit features a 5/16 inch hex shank drive and measures 6.9 inches overall length, making it compatible with standard power tool holders, extension bars, and manual bit handles. The IP15 Torx Plus profile provides a tighter fit to the fastener head compared to standard Torx, reducing cam-out and fastener damage during high-torque applications. HVAC technicians, electricians, and equipment service pros rely on this profile when working on manufacturers that specify Torx Plus hardware at the factory.
This insert bit suits a wide range of service work where IP15 Torx Plus fasteners appear, including HVAC equipment panels, electrical enclosures, and commercial appliance assemblies. The 5/16 inch hex drive is the standard bit shank size for most 1/4 inch and 5/16 inch quick-change bit holders, making it directly compatible with common cordless screwdrivers and impact drivers equipped with appropriate adapters. Sold individually, it is well suited as a replacement or addition to an existing bit set.
Designed as an OEM-style insert bit replacement compatible with standard 5/16 inch hex drive bit holders accepting IP15 Torx Plus profiles.
This bit is installed by trade professionals including HVAC technicians, electricians, and general equipment service techs. Ensure the hex shank is fully seated in the bit holder before applying torque. Inspect the Torx Plus tip for wear or deformation before use, as a worn tip increases the risk of fastener damage. Follow equipment manufacturer torque specifications when working with sensitive enclosures or electrical components.
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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