Klein Tools 409-70591 9-Key Folding Hex Nutdriver
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Drop-forged S2 steel XZN triple-square bit sockets in 10 sizes for European vehicles, meeting ANSI standards
This 10-piece set provides XZN triple square bit sockets in metric sizes for European vehicle maintenance. It covers 1/4", 3/8" and 1/2" drive sizes to match common ratchets and breaker bars. The assortment targets technicians and enthusiasts working on BMW, Mercedes, VW, Audi and Porsche models. It is not intended for impact-tool applications.
Drop-forged, heat-treated S2 steel bits resist wear during high-torque fastening. Chrome-vanadium socket bodies add structural strength under load. A chrome plating on all pieces protects against rust and corrosion in workshop environments. The blow-moulded storage box keeps components organised and portable.
The set meets and exceeds ANSI standards for dimensional accuracy and hardness. Capri Tools backs the product with a lifetime replacement guarantee against manufacturing defects. The included blow-moulded case simplifies tool control and protects the bits between jobs. No impact-rated use is supported.
Measured against everything we stock in Screwdrivers, Nut Drivers & Hex Keys, at today’s prices. Recalculated every night.
| Product | |
|---|---|
| Product type | Nut Drivers |
Select the correct drive size — 1/4", 3/8" or 1/2" — then push the socket onto the square drive until the detent ball clicks; the step people miss is verifying the bit size matches the fastener before applying torque.
Wipe bits and sockets clean after each use, keep the chrome plating free of moisture to prevent corrosion, and store all pieces in the blow-molded case; damaged bits are covered by the lifetime replacement guarantee.
The bits and sockets are rated for hand tools only — breaker bars, torque wrenches and ratchets — so sustained impact use will exceed the design limit before the S2 steel or chrome-vanadium material fatigues.
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