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BLK BOX Goliath Adjustable Jammer Arms

Normaler Preis £1,120.00 GBP
Normaler Preis Verkaufspreis £1,120.00 GBP
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SKU: 21-1121

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Please note: The lead time for this product is approx. 15 working days. To keep track of when your item is ready to ship, please check the online order tracker.


The BLK BOX Goliath Adjustable Jammer Arms were designed with high performance in mind. Manufactured from start to finish in our Belfast HQ, these Jammer Arms not only offer a range of additional movements, but their modular capability saves valuable floor space.

The addition of the BLK BOX Goliath Adjustable Jammer Arms to a facility opens an endless array of dynamic, complex, explosive or isometric training options. These include but are not limited to incline, decline and flat bench press, along with shoulder press, rows, jammer press, shrugs, squats and deadlifts.

A key offering of the Jammer Arms is they allow athletes to perform explosive movements with greater control and stability when compared to similar free weight movements. The athlete can be placed in the optimum position to ensure correct form throughout the range of movement.

Another advantage of their independent design means they can be used for bilateral and unilateral training, allowing athletes to isolate weaknesses or correct in-balances, while also providing a option for athletes new to training or undergoing recovery, and require a fixed or limited range of motion.

Compatible with any Goliath Rigs & Racks purchased from July 2021, the Adjustable Jammer Arms handles can be quickly and easily detached, and then the arms can be rolled up the upright to a height of the athletes choosing, before being reattached. When in position, each Jammer Arm is held using a bespoke designed pull pin, in partnership with a high tensile locating pin for extra security. This spring loaded pull pin snaps back into place at the selected height. A high density rubber bump stop has been added to the rear of the arm to cushion any impact on the uprights.

The arm of each Jammer Arm is manufactured using the same 60x60mm laser-cut steel as our Goliath Uprights. In addition it features the same 4-way hole pattern as the uprights, allowing Goliath Rig and Rack Attachments to be added. This modular design also allows the handles to be moved up and down the Jammer arm to any desired height. Combined with the ability to roll up and down the upright, there is an endless possibility of setups.

Designed and made in Belfast, each component of the Goliath Adjustable Jammer Arm has been meticulously designed, tested, and improved to offer maximum performance and durability. Each arm rotates on a combination of solid high tensile chrome bar, and durable self-lubricating roller bearings. The Jammer Arm rolls up and down the upright utilising high impact acetal rollers and high speed bearings, together they offer fast and smooth adjustment. Alongside internal nylon plating of the bracket, the acetal rollers are designed to ensure no scraping of your paintwork. The bracket wrapping around the upright is constructed of durable 10mm laser-cut mild-steel, and features a 30mm diameter zinc-plated handle with 1.2mm knurl. This extra grip ensures no issues when adjusting.

Furthermore, the detachable handle offers an ergonomic 30mm grip, perfect for pulling, pressing and many other movements. This handle features a zinc-plated weight pin, capable of holding 120kg of BLK BOX HD or Colour HD Bumpers. This handle also offers 4 different grip positions; low, high, neutral and 45 degrees.

All components on the BLK BOX Goliath Adjustable Jammer Arms are machined, fabricated, welded, powder coated and assembled at BLK BOX HQ in Belfast. All handles, bearing housings, pins rollers and weight pins are machined on our CNC high precision machines. A high number of parts are welded using our robot welder, while some parts require the detailed touch of our in-house welding team.



  • Grip Positions: High, Low, Neutral and 45 degrees
  • Handle Diameter: All handles 30mm
  • Material and finish:
    • Laser cut mild steel arm and bracket
    • Zinc plated steel weight pin
    • Zinc plates and knurled adjuster handle
    • Bespoke steel pull pin
    • High tensile steel locking pin
    • High impact acetal rollers and nylon plating
  • Plate Capacity:
    • Each arm can hold:
      • 120kg of BLK BOX HD or Colour HD Bumpers, or
      • 140kg BLK BOX Competition Plates, or
      • 55kg of BLK BOX Impact Bumpers, or
      • 85kg of BLK BOX Blackout Bumpers
  • Arm Length: 1236 mm
  • Overall Length: 1290 mm each arm
  • Overall Width: 190 mm each arm
  • Overall Depth: 215 mm each arm when in rest
  • Weight 28.7kg each arm

Shipping & Returns

We aim to dispatch and deliver all in stock items within 2-10 working days depending on your location in the UK & Ireland.


We ship our orders via Parcel / 2 Man Delivery or Pallet depending on the size of your order and shipping fees will be calculated at checkout. To track your order click here for orders placed online; Track an Online Order and here for orders placed via our Sales team; Track an Offline Order


All deliveries are kerbside, it will be your responsibility to remove the items from the pallet on arrival and dispose of the pallet. You will receive an email from our Logistics team with a date of delivery. If you require an alternative delivery date or if there are any access restrictions to your property, please let us know within 24 hours before delivery by emailing team@blkboxfitness.com. Please be aware failure to do so may result in additional delivery charges.


Some of our training equipment is manufactured here in our HQ. The lead times on these products range from 25-35 working days and are identified by having the MADE IN BELFAST badge.


We understand at times due to size, colour or type some items might not be the right fit for you. We are happy to accept a returned item within 30 days from the date of you receiving the item for a refund or exchange.

To start a return click here; BLK BOX Returns


How do I adjust the height of the Adjustable Jammer Arms?
The Adjustable Jammer Arms are quickly adjusted by removing the locking pin, before pulling the pull pin out, selecting your desired height, then releasing the pull pin, and replacing the locking pin.

What are they compatible with?
The Goliath Adjustable Jammer Arms are compatible with any Goliath Rigs & Racks purchased after July 2021, can can be retrofitted to any existing Samson setup. Their modular design also allows any Goliath Rig and Rack Attachments to be added to them. 

How much weight can I add?
The Goliath Adjustable Jammer Arms are each capable of holding 120kg of BLK BOX HD or Colour HD Bumpers, or 140kg BLK BOX Competition Plates, or 55kg of BLK BOX Impact Bumpers, or 85kg of BLK BOX Blackout Bumpers.

Do I need the Locking Pin?
We would strongly recommend having the locking pin in the bracket during usage of the Goliath Adjustable Jammer Arms.

  • Free Shipping

    Buy more of the products you like and claim free shipping on orders over £500.

    Over £150 for apparel and footwear products (T&Cs Apply).

  • Hassle-Free Exchanges

    If you change your mind, you can return unused items, original packaging and
    tags within 30 days. If the product's colour or size isn't right, you can swap them for the preferred option.

How We Manufacture Our Products at HQ

  • Robotic Welding

    We use Robotic Welding and a team of experienced welders at our HQ to ensure safe, repeatable high-quality welds, every time.

  • CNC

    We utilise a range of machines including HAAS CNC lathes and press brakes in-house to ensure precision components are produced for all of our equipment.

  • Powder Coat Line

    Our cutting-edge Gema automatic powder coating line ensures a high quality and durable finish every time and is also environmentally friendly and safe in comparison to wet paint finishes. We offer 9 colours as standard but can offer any custom colour on request.

  • Laser-Cut

    Locally sourced steel is laser cut at our HQ using the latest Trumpf laser cutting machines to ensure high quality and precision across all of our products and components.

How It's Made

  • Built to Last

    Every product we manufacture at our Belfast Headquarters is backed by a lifetime structural warranty. We prioritise quality & durability over profit margins and guarantee everything we make.

  • Fast Shipping Worldwide

    We offer fast, affordable and reliable shipping worldwide. Orders can be tracked from when your order has been placed until it arrives using the BLK BOX shipping system.


    All of our products come with easy to follow assembly guides and/ or video instructions to ensure you can assemble your equipment quickly and safely and start training.