Herm Sprenger Prong Collar Position
Herm Sprenger Prong Collar Position Size
Herm Sprenger Prong Collar Position
Herm Sprenger Prong Collar Position Size

Herm Sprenger® 3.2mm Ultra-Plus Prong Collar – Twin O-Ring (Black Stainless Steel)

£38.00

A great piece of equipment to begin teaching your dog the foundation of following leash pressure, the Herm Sprenger 3.2mm Ultra-Plus prong collar is a tool that provides clear communication between dog and handler. The collar itself has blunt, rounded prongs that spread pressure evenly around the neck, instead of one pressure point on the trachea like a flat collar. We only supply genuine Herm Sprenger prong collars — German-engineered and the standard trusted by working and sport handlers worldwide — with the Ultra-Plus centre-plate for a smooth, secure fit. Fitted correctly and used with guidance, it can make your walks enjoyable again.

Best for large, powerful and strongly-driven dogs — think mastiff types, big working-line German Shepherds and Malinois, or powerful bully breeds. The 3.2mm is our heaviest gauge, built for durability and clear communication on a strong dog, in a black stainless steel finish — the same rust-resistant steel with a discreet matte-black coating. Choose your gauge by your dog's strength, not neck size — length is set by adding or removing links.

Twin O-Ring or Swivel D-Ring — which should I choose?

Both attach your lead to the same collar; the difference is how the pressure feels and how the lead sits.

  • Twin O-Ring — two rings give you a choice. Clip to both rings for a softer, limited-cinch action (the "dead ring" setup most handlers use day to day); clip to the single live ring for a fuller, more direct tightening action when you want clearer feedback. The versatile, adjustable option.
  • Swivel D-Ring — a single ring on a swivel that turns freely so your lead never twists or tangles. A clean, direct connection, ideal for dogs that move around a lot, switch sides, or work on a long line.

This collar is the Twin O-Ring version.

CORRECT USE & FITTING

A prong collar only works when it's fitted correctly — worn wrongly it's both useless and unkind.

  • In most cases the collar should sit high on the neck, right behind the ears and up under the jawline.
  • Fit it snug by adding or removing links so it sits high and level — never buy a bigger collar and leave it loose.
  • Match the gauge to your dog's size, not to the collar's length.
  • Always run a backup: a safety clip or coupling strap to a flat collar, so your dog is never held by the prong alone.
  • Generally we would not recommend prong collars for dogs under 7–9 months.
  • New to prong collars? Work with a qualified balanced trainer. A prong supports training — it isn't a shortcut.

As with any training tool, you must condition the dog to the tool to ensure the best results. Applying a prong collar will not magically fix your dog's pulling issues, but when introduced and conditioned properly, it can improve and build strong communication between you and your dog.

We do not condone the improper use of our training prong collars. We strongly recommend seeking professional advice before utilising any training tool. To browse our list of dog trainers and behaviourists, please click here.

Features & Benefits
  • Built in Germany — over a century of refinement in prong-collar engineering, the standard among professional balanced trainers.
  • 3.2mm wire gauge — heavy-duty strength for medium-to-large working and sport dogs in the 25-40kg range.
  • Twin O-Ring configuration — single ring for everyday correction, or both rings together for direct two-point feedback in higher-distraction work.
  • Black stainless steel finish — same Herm Sprenger construction, with a discreet matt black coating that's corrosion-resistant and tactical-looking.
  • Centre-plate design — pioneered on Herm Sprenger's Neck Tech range, distributes pressure evenly across precision-cast prongs.
  • Resize with links — base collar fits necks up to 48cm; add or remove individual middle links for a precise fit.
More Info
How the Twin O-Ring works
The Twin O-Ring configuration gives you two attachment points on the collar — one on each side. Standard use is to clip your lead to a single ring for everyday correction, but you can attach both rings simultaneously for more direct, two-point feedback in higher-distraction work or when introducing the collar to a new dog.
Many trainers use the dual-ring setup during initial conditioning when the dog needs the clearest possible feedback, then transition to single-ring for everyday handling once the conditioning is established.
Why black stainless steel?
The black coating is purely aesthetic — same Herm Sprenger steel underneath, same construction, same precision-cast components. Choose it if you want a more discreet, lower-profile look on the dog or simply prefer the matt finish over polished steel. Just as durable and corrosion-resistant as the standard stainless option.
Which dogs this fits
The 3.2mm gauge is built for medium-to-large working and sport dogs in the 25-40kg range. Typical breeds: full-size German Shepherds, larger Belgian Malinois, Labrador Retrievers, Golden Retrievers, Boxers (full frame), Rottweilers (smaller frame), Dobermans, Standard Poodles, and similarly-sized working breeds. Base collar fits necks up to 48cm; add middle links to extend.
If your dog has a neck under 41cm, the 3.0mm Short Link will give a more refined fit with the same training strength. If above 40kg or 48cm neck even with extension links, step up to the 4.0mm gauge.
Fitting
Position the collar high on the neck — behind the ears, just below the jawline — and aim for a two-finger fit when the lead is unweighted. Resize by adding or removing individual middle links (spare links ship with the collar) rather than letting the chain hang slack.
Always pair the prong with a backup safety connection (flat collar and back-clip harness, or slip lead loop) — even a perfectly fitted prong can release if a link works loose, and the safety prevents an off-lead moment with a strong dog.
When not to use
This is a training tool, not a permanent walking collar. Do not use on dogs under approximately 7-9 months of age, for off-leash work, in crates, during travel, or on dogs with neck or thyroid conditions without veterinary clearance. If you're new to prong collars on a larger dog, work with an experienced balanced trainer for the first few sessions.
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