Klein Tools 33801 Impact Driver Bit Set | ProFlex S2 Bits, Magnetic Nut Drivers, MODBox Case – 40-Piece

Overview

Klein Tools 33801 delivers a 40-piece ProFlex bit set designed for professionals and dedicated DIYers. The bits are built from high‑impact S2 steel and feature an energy‑absorbing torsion zone that helps absorb impact forces, aiming to extend bit life under demanding use. The result is a kit that pairs rugged performance with practical versatility for a range of tasks.

With a 3‑inch bit holder and magnetic 1/4‑inch and 5/16‑inch nut drivers, you can keep bits and fasteners in place as you work. A minimal chamfer on hex pockets increases surface contact between nut and driver, contributing to steadier seating and reliable torque transfer during challenging fasteners.

Key benefits

• Energy absorbing technology helps reduce recoil and extend bit life under heavy use
• Impact-rated S2 steel bits are built for durability in tough applications
• Phillips and Square bits reach hard‑to‑access fasteners, including the 3.5‑inch Phillips #2
• Magnetic 1/4‑inch and 5/16‑inch nut drivers simplify bolt seating
• Powerful bit extension magnet secures bits for quick changes
• 40-piece assortment covers Philips, Slotted, Square and TORX
• Compact storage case is durable, impact‑resistant, and MODBox compatible

Included in the set

• 40 bits across Philips, Slotted, Square and TORX families
• 3-inch bit holder
• 1/4-inch and 5/16-inch magnetic nut drivers
• Case compatible with Klein MODBox system

Storage and compatibility

The modular, stackable design keeps your tools organized and transport-ready. The rugged case features steel hinges and a stay-shut latch, ensuring the kit stays intact on busy job sites and in transit.