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The WIHA 70320 is a T25 Torx power screwdriver bit designed for use with 1/4 inch hex drive power tools and impact drivers. Each bit measures 3.5 inches in overall length, providing sufficient reach for recessed fasteners without excessive flex under load. The package includes 2 bits, making it practical for keeping a spare on hand during continuous production work or field service calls. Trade professionals in HVAC, electrical, and general mechanical service rely on this bit size for equipment panel fasteners, junction box hardware, and other Torx-head applications common across commercial and residential installs.
The T25 Torx drive size is widely encountered in HVAC equipment panels, electrical enclosures, and light commercial equipment fasteners. The 1/4 inch hex shank is compatible with standard power screwdrivers, drills, and impact drivers equipped with a 1/4 inch quick-change chuck. The 3.5 inch length suits both surface-level and moderately recessed fastener locations. This 2-piece pack is suited for technicians who want a working bit and a backup in the same package.
Designed for use with any 1/4 inch hex drive power screwdriver, drill, or impact driver equipped with a standard quick-change bit chuck. Fits T25 Torx fasteners as encountered across HVAC equipment, electrical enclosures, and general mechanical assemblies.
Install and remove using a power screwdriver or impact driver with a 1/4 inch quick-change chuck — no additional tools required for bit seating. Confirm the bit is fully seated in the chuck before applying power to prevent cam-out or fastener damage. When working inside energized electrical or HVAC enclosures, follow NFPA 70E lockout/tagout procedures and de-energize equipment before accessing fasteners. Replace the bit at first sign of tip rounding or wear to maintain proper fastener engagement.
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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