Features: Prevent Damage: F.A.T. Wrench achieves perfect torque without causing damage to the fastener. Complete Set: Assortment includes Flat, Phillips, SAE/Metric Hex, Star, and Specialty bits that fit most firearm fasteners. Precise Fit: Hollow-ground flat bits are precision fit to prevent damage to screws and firearms. Rust-Resistant Bit Coating: Black phosphate coating on bits protects against rust and corrosion. Secure Storage: Latching hard-sided case organizes bits and protects contents, keeping them secure and protected during transport and storage.