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HASSLER INSTRUMENTS Bolt Action Spring Bar Tool - Brass - Gladfellow Edition

HASSLER INSTRUMENTS Bolt Action Spring Bar Tool - Brass - Gladfellow Edition

Regular price $195.00 USD
Regular price Sale price $195.00 USD
Sale Sold out
Shipping calculated at checkout. Complimentary on domestic orders over $100.

Out of stock


  • If you received a restock notification and the product is already out of stock, you’ll need to sign up again if you still wish to receive notifications about the next restock.
  • The notification service is not a waitlist. It is simply to be notified when we have stock. This is first come, first serve.
  • Only one per customer. Orders of more than one will be reverted to one.
  • We are doing our best to stock as many of these as we can as fast as we can. Thank you for your continued understanding and patience. 


If you have used a watch spring bar tool, then you can attest they are often finicky to handle, easy to break, and lack any sort of balanced weight for stability.  Tom Bushey of HASSLER INSTRUMENTS saw this problem and reinvented a classic tool.

The HASSLER INSTRUMENTS Bolt Action Spring Bar Tool is a manually machined and hand finished masterpiece.

The tool features a convenient - and satisfying to operate - mid body bolt action design which provides instant access to a Bergeon 6767-AF fine fork spring bar tip.

When not in use the tip retracts into the tool body, protecting the tip until your next strap change.

A second spring bar tool, with a Bergeon 6767-BF Fine Pin style tip, is accessed by unscrewing the tool end cap. This mini spring bar tool is useful for bracelet clasp resizing or changing straps on watches with drilled lugs.

The solid weight of the tool creates a superb stability, allowing for steady movements while utilizing it to change your straps. In other words, a much greater chance of keeping your luxury watch collection scratch free.

The Gladfellow collaborative edition adds a lathe turned grip along the top as well as the signature Gladfellow logo on the end cap. Each tool is also marked for authenticity with HASSLER on the front side of the pocket clip and numbered on the inside of the pocket clip.

The tool is made in small batches and is normally only available directly from HASSLER INSTRUMENTS thru a waitlist/pre-order process with lengthy lead times. The Gladfellow collaborative edition will allow you to immediately buy one when they are available in the shop.

Do not miss the opportunity to own the absolute best in spring bar tools. It's a perfect complement to any watch collection.

  • Special Gladfellow edition with grips.
  • Engineered from solid brass with a sturdy weight and excellent stability.*
  • Includes replaceable Bergeon Fork, Fine: 6767-AF on the tip.
  • Includes replaceable Bergeon Pin, Fine: 6767-BF under the screw cap.
  • Bolt action protects the spring bar tip.
  • Small batch and individually numbered.
  • Made in the USA.

Dimensions: ~5.5" (long) x 3/8" (diameter)

*Brass will oxidize and develop a stunning patina. Please make sure to read our return policy regarding brass and copper products.

Shipping Policy

For our domestic customers, we offer complimentary USPS Ground Advantage shipping on all orders above $100.00. Ground Advantage comes with tracking services and $100.00 of insurance with a shipping time of two to five business days. Depending upon shipping rates, your package may be upgraded to a better service at no cost to you. Occasionally, on larger orders, we will add signature confirmation free of charge as a deterrent to theft. 

Items will ship within two business days (Monday-Friday excluding holidays). Photographs ship within two weeks. 

Shipping rates are automatically calculated at checkout and can vary by several factors including location, weight, dimensions, and shipping method. We offer a variety of shipping methods based on your needs in terms of speed and affordability.  Every service we provide comes with tracking and $100.00 of insurance 

For our international customers, we ship via UPS. If you are an international customer, please also be aware of your own local laws. We are not responsible for any loss due to confiscated packages by customs in your country. Prior to purchasing, please do your own research on customs, prohibited items, restrictions and limited delivery locations via your shipping method. International customers are responsible for all additional customs/brokerage charges. 

For more information on our full shipping policies, please see shipping policies.

Return Policy

Returns are accepted up to 30 days after receipt of your order if the merchandise is in its original, unused condition, along with the original packaging. Brass products such the HASSLER INSTRUMENTS Bolt Action Spring Bar Tool that have been handled and begun oxidizing are no longer considered new and unused and will not be eligible for a refund. Returns received after the 30 day period will not be accepted.

If the return is a result of our shipping error or a defective product, we will refund the non-expedited shipping costs of the return. Otherwise, return shipping costs are non-refundable. Please keep in mind, orders that initially shipped free will have the original shipping charges deducted from the refund. For our full return policy, please see return policies.


Founded by Tom Bushey, HASSLER INSTRUMENTS is named after Ferdinand Hassler, a Swiss-American Surveyor and Mathematician. In 1816 Hassler was appointed as the first Superintendent of the Survey of the Coast, the first scientific agency in the United States. Hassler was known for designing the instruments he used in his surveys, a practice that inspired the creation of the first HASSLER INSTRUMENTS Bolt Action Spring Bar Tool. Each tool is made to order on manually operated machine tools and finished by hand in our St Paul, Minnesota workshop.

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