Tough viscous Wera bits for hexagon socket screws for universal use. The Hex-Plus profile offers a greater contact surface in the head of the screw.The notching effect is therefore reduced to a minimum and damage to the screw head more or less eliminated. 1/4" hexagon, suitable for holders as per DIN ISO 1173-F 6.3.For socket head screws. Ductile and tough for hard materials. Hex-Plus allows socket head screws to live longer. 1/4" hexagon drive (Wera connecting series 4). Suitable for AEG, ARO, Atlas-Copco, Biax, Black & Decker, Bosch, Buckeye Tools etc..

Wera 840/4 Z Hex-Plus Bits, 89mm, Ductile Tough Steel for Hard Material

Reference Number: 3CW3EE

Upgrade Your Tool Collection with Wera 840/4 Z Bits - 4 x 89mm Ductile and Tough for Hard Materials

Optimize your fastening tasks with the high-performance Wera 840/4 Z Bits, engineered for durability and precision in demanding applications. Crafted from premium, ductile materials, these bits are specifically designed to tackle hard materials and high-torque environments, making them an essential addition to professional bike shop mechanics and DIY enthusiasts alike.

Materials & Engineering Excellence

Constructed from high-quality, resilient steel, Wera 840/4 Z Bits offer exceptional toughness and ductility, ensuring long-lasting performance under heavy use. The precise manufacturing process guarantees minimal wear and tear, even when working with tough, resistant materials. The bits feature a robust 89mm length optimized for versatility and reach in various fastening scenarios.

Innovative Components & Technology

Equipped with the innovative Hex-Plus profile, these bits provide an increased contact surface with socket head screws, significantly reducing notching effects and preventing damage to screw heads. The 1/4" hexagon drive compatible with the Wera connecting series 4 ensures a secure fit and optimal torque transfer, backed by advanced engineering that extends the lifespan of both screw and bit.

Perfect for Style & Versatile Use Cases

Designed for universal use across a broad range of applications, Wera 840/4 Z Bits are compatible with socket head screws commonly found in bicycle components, cycling gear, and accessories. Whether you're installing or repairing tough bike parts, these bits deliver reliable performance, making them suitable for professional workshops and serious DIY projects.

Key Features & Benefits

- Ductile and tough steel construction for high durability in hard materials

- Hex-Plus profile minimizes screw head damage and extends screw life

- 1/4" hexagon drive compatible with DIN ISO 1173-F 6.3 standards

- Suitable for use with leading power tools from AEG, Bosch, Black & Decker, and more

- Ideal for bike maintenance, cycling gear assembly, and accessory installation

Enhance your toolkit with the Wera 840/4 Z Bits - engineered for precision, durability, and efficiency. Perfect for bike professionals and cycling enthusiasts seeking reliable, high-quality bits that withstand tough conditions and deliver superior results.

  • Premium Wera 840/4 Z Bits feature durable, high-quality ductile steel construction, ensuring exceptional toughness and longevity when working with hard materials and tough fasteners.
  • Designed with the innovative Hex-Plus profile, these bits minimize cam-out and reduce screw head damage, enhancing tool lifespan and providing a secure fit for hexagon socket screws.
  • Engineered for versatile use across a wide range of power tools and screwdriving applications, compatible with 1/4" hexagon drives as per DIN ISO 1173-F 6.3 standards, suitable for brands like Bosch, Black & Decker, and AEG.
  • Ideal for professional mechanics and heavy-duty DIY projects, these bits excel in demanding environments, offering reliable performance and reduced striping even under high torque.
  • Featuring a universal, corrosion-resistant finish, the Wera 840/4 Z Bits combine superior materials and engineering to deliver long-lasting, precise fastening in industrial, automotive, and construction settings.

Why 365 Cycles?

365 Cycles is an Authorized Wera Dealer, and we offer the Full Wera Warranty!

Fast Shipping!

Professional Customer Service- available 7 days a week
Check out our 200,000+ amazing reviews!

365 Cycles delivers all your cycling needs fast! We don't waste time preparing your order. Our priority is to serve our customers first and foremost. If you need help picking the right product, have questions about bike component compatibility, or just want to geek out about bikes we are here 7 days a week! Simply put, we are bike experts from dirt to tarmac and want to make sure you get the full 365 Cycles experience when you shop with us.

At 365 Cycles our mission is to simplify the shopping experience. We want to get you the right product in a quick time frame and be here if you need help with questions, warranty, friend to talk to, etc.

We’re dedicated to building lasting relationships with our customers, communities, and team members. We combine the knowledge and service of a traditional bicycle shop with the convenience of shopping in your own home.





Shipping & Handling

Most orders placed during the workweek before 1:30 pm EST ship the same day, but in rare cases (peak season/holiday periods) handling time can take up to 48 hours. If you have questions regarding shipping estimates, please let us know prior to placing your order. There is a direct signature requirement for all orders over $500.

Please allow 1-2 business days for your order tracking to update.

  • Cut off for SAME DAY SHIPPING- 1:30 pm EST Monday - Friday
  • Friday afternoon -Sunday orders ship the following Monday
  • Due to carrier restrictions orders shipped to: PO Box, HI, AK, & PR 365 Cycles may use a comparable service to what was selected.

Combined Shipping Discounts

To offer customers savings on shipping, we offer discounts when shipping multiple items from our store. We cannot issue refunds on shipping once an order is finalized so please follow the 5 steps below and ask if you are having trouble with the discount before you make a purchase.

  1. Be sure you are using the US site: https://www.ebay.com
  2. Select Add to Cart (instead of Buy It Now) with items from our store 365Cycles
  3. Click on Proceed to Checkout. On the checkout page, the shipping service on each line item needs to match
  4. Compare First Class vs Priority as sometimes Priority can be cheaper and it gets to you faster!
  5. You’ll need to change the shipping method to Priority on every item in your cart before the rate can be calculated.

Returns

365 Cycles offers returns for 30 days on new items in their original, intact packaging. Return shipping for ALL orders are to be paid by the buyer. Please be sure to read our return policy entirely and if you have any questions, please contact Customer Service.

Full refunds are issued on items that are brand new and we are able to resell as new. 365 Cycles reserves the right to deny returns that are outside of policy including, but not limited to, used items, items missing original packaging, items with damaged manufacturer packaging, or international orders. Return orders must be shipped in a box or bubble mailer. Items shipped without an outer box will incur a restocking fee. You will be contacted through eBay if your return is ineligible for a full refund.

Returns must be initiated within 30 days from purchase date through your Purchase History under My eBay.

If we make an error in shipping, please contact us -- we will ship out the correct item and provide a free prepaid return label as quickly as possible!

Exchanges

If you need to exchange your order, the fastest and easiest way to do this is to reorder. We will ship your new order immediately and, in the meantime, please initiate a return through eBay on the original item and return it. We will refund for the returned item once it is received back.



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Company Details

365 Cycles
1180 Enterprise Rd
East Petersburg, PA 17520
United States

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