Wheeler Pro F.A.T. 100-Piece Precision Screwdriver Set - Model 4001004

The Wheeler Pro F.A.T. 100-Piece Precision Screwdriver Set is a complete gunsmithing toolkit built around the torque-controlled F.A.T. Wrench—one of the industry's most trusted fastening tools for firearms work. If you're building, maintaining, or customizing rifles, shotguns, or pistols, you need a screwdriver set that handles delicate action screws and scope mounts without stripping fasteners or damaging finishes. This 100-piece set combines that precision wrench with 98 bits and adapters to cover virtually every fastening job on the workbench.

The F.A.T. Wrench itself operates within a 10–65 inch-pound torque range, letting you apply exactly the right amount of force for trigger components, rail systems, and optics mounts without over-torquing. Both the wrench and the ¼" driver handle are fitted with textured rubber grips that give you control and comfort during long sessions at the bench or in the field. The bits themselves are coated in black phosphate to resist rust and corrosion—important when you're storing tools in a range bag or safe for months between projects.

Organization matters on a gunsmith's bench. The set ships in a molded case designed to keep bits sorted and accessible, so you're not hunting for the right flat-head or Phillips bit when you're trying to make a scope adjustment or reassemble a lower receiver. The hollow-ground flat bits deserve special mention: that design creates a precise, high-contact fit with fastener slots, which is the difference between a clean disassembly and a rounded-out screw head that costs you time and frustration.

Key Features

• F.A.T. Wrench with 10–65 inch-pound torque range for controlled fastening without damage
• 98 screwdriver bits and adapters covering most gunsmithing and firearms maintenance tasks
• Hollow-ground flat bits for precise fit and screw head protection
• Black phosphate coating on bits prevents rust and corrosion
• Textured rubber grip on both wrench and ¼" driver handle for control and comfort
• Molded carrying case organizes and protects all components

Specifications

Frequently Asked Questions

Is this set suitable for rifle scope mounting and optics installation?

Yes. The F.A.T. Wrench's 10–65 inch-pound range and precision bits make it well-suited for mounting scopes, red dots, and other optics without over-torquing fasteners or damaging finishes.

What's included in the 100-piece set?

The set includes the F.A.T. Wrench, a ¼" driver handle, and 98 screwdriver bits and adapters. All components come organized in a molded carrying case.

How does the F.A.T. Wrench prevent fastener damage?

The wrench operates within a controlled 10–65 inch-pound torque range, stopping you from over-tightening. Combined with the hollow-ground flat bits that provide a precise, high-contact fit in screw slots, this design minimizes the risk of stripping or rounding fastener heads.

Are the bits resistant to corrosion?

Yes. The bits are coated in black phosphate, which prevents rust and helps them hold up in storage or field use.