The 4.0 mm Boss Buckle from Katie’s Buckles is a durable, functional upgrade designed specifically for select Herm Sprenger prong collars. This buckle replaces the center dividing plate on collars that utilize opposite-facing links. Two links are mechanically attached to the buckle, allowing for straightforward installation and a secure, dependable connection.
Compatibility is limited to Herm Sprenger prong collars built with this specific center-plate and opposing-link configuration. The Boss Buckle is not compatible with prong collars that do not use this design. Please confirm your collar’s structure and size before ordering.
The buckle is available in Black, Silver, and Antique Brass finishes. The attached links are crafted from high-quality materials, including Black Stainless Steel and Chrome, to ensure strength, durability, and long-term performance. Combining functionality with refined aesthetics, the Boss Buckle enhances both performance and appearance during training. Please review sizing details prior to purchase.
Note: Due to recent tariff changes, a 5% tariff charge is added to affected items. We’re committed to transparency and will adjust pricing if tariffs are reduced. Thank you for your understanding.
Sizing
Collar Sizing Guide:
1.5mm Micro Collars: Fits necks up to 10", max weight 15 lbs.
2.25mm Collars: Fits necks up to 14", max weight 40 lbs.
3.0mm Short Link Collars: Fits necks up to 16", max weight 88 lbs.
3.0mm Regular Link Collars: Fits necks up to 18", max weight 88 lbs.
3.2mm Collars: Fits necks up to 20", max weight 88 lbs.
4.0mm Collars: Fits necks up to 22", max weight 154 lbs
You can add or remove links to adjust the size of your collar! Additional links for your collar may be purchased here.
Safety
For your safety and your pet's safety, we recommend the following when using any training collar: Always remove a prong collar if your dog is unsupervised, tied up, or playing with other dogs. The buckles and collars are not designed to come off on their own, but for any prong collar, (with a buckle or not), please use a safety back-up method in case your collar does come off during use. Follow recommended weight restrictions for all metal collars. Katie's Buckles is not responsible for any damage or injuries.
I suggest contacting an experienced trainer local to you for proper fit and instruction on any type of training collar. You can find our trainer directory here.
Shipping & Returns
Shipping
Orders are insured and shipped via USPS Ground Advantage or USPS Priority 1-3 Day within 1-5 business days of purchase date.
Returns
If you are not 100% satisfied with the quality of your purchase, you can return your undamaged/unaltered items within 30 days from the delivered date. If there are issues with your products after 30 days, please reach out to me and I'll do everything I can to help.
Please see the shipping and returns page for more information.
Warranties
Katie’s Buckles warrants this product to be free from defects in workmanship and materials, under normal residential use and conditions, for a period of one (1) year from the original purchase date.
To initiate a warranty claim, customers must submit clear photos of the defective item via email.
- Domestic Orders (within the U.S.): Upon approval of the claim, the item will be replaced or refunded at our discretion.
- International Orders: Upon approval of the claim, the item will be refunded rather than replaced.
This warranty applies only to products used under normal residential conditions. Abuse, misuse, or modifications will void the warranty.
Herm Sprenger N.A. LP guarantees all of their products to be free from defective materials and subpar workmanship. If you are not 100% satisfied with your purchase, please contact us.
Please note: You will need to provide proof of purchase and return the defective item before your request can be processed. Any damage determined to be caused by improper use will not be covered. Returns will not be accepted beyond one (1) year from the date of purchase.
- Domestic Orders (within the U.S.): Upon approval of the claim, the item will be replaced or refunded at our discretion.
- International Orders: Upon approval of the claim, the item will be refunded rather than replaced.
Exclusions
Please note that the following conditions are not covered by this warranty:
- Metal discoloration or cosmetic wear.
- Quality issues arising from improper use or misuse of the product, including exceeding the recommended weight limit.
- Damages resulting from accidents or neglect.
This thing is a life saver! My poor dog is so patient, letting me struggle with his collar, but I'm not as patient. LOVE THE BUCKLE!
McKenna
My Dad ordered the buckles from Ireland and received a prompt and excellent service. They are brilliant for him, as his fingers get stiff now. He is full of praise for the buckles, thinks they are fantastic and delighted how easy they are to use. He wishes Katie all the best for her great product and hope she is successful in her business.
Mac
I ordered this buckle and it makes the prong collar a breeze. The quality is nice and the appearance is as well. I look forward to using it and purchasing more in the future.
Andrew name
It's been a lifesaver for my family and allowing me to get out on long walks and not have my arm pulled off by my energetic and sweet dog.
Emily
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