Built for raw power and explosive performance, the Hammer Strength Ground Base® Jammer is the real deal—no imitations, no compromises. While racks try (and fail) to mimic its movement, only the Jammer delivers the perfect blend of converging and diverging motion, unlocking true athletic drive.
Designed in the ‘90s and still unmatched today, it’s the gold standard for developing force, power, and on-field dominance. When it comes to training like an athlete, there’s no substitute—there’s only the Jammer.
Hammer Strength
Hammer Strength Ground Base Jammer
Free Delivery & Install
Made in USA using Global Materials
Color:CharcoalCharcoal
In-home delivery
This item will be delivered and installed within 16-18 weeks
- Placement in the room of your choice
- Professional assembly and removal of packaging
In-home delivery
This item will be delivered and installed within 5-7 weeks
- Placement in the room of your choice
- Professional assembly and removal of packaging
Special Order
| Dimensions (L x W x H) | 66 in x 79 in x 83 in (167 cm x 202 cm x 212 cm) |
| Weight | 370 lb (168 kg) |
| Max Load Capacity (per arm) | 4 x 45 lb plates (4 x 20 kg plates) |
| Starting Resistance (per arm) | 8 lbs (3.6 kg) |
| Recommended Plate Mix | 4 x 45 lb plates, 4 x 25 lb plates, 4 x 10 lb plates |
| Weight Storage Horns | 6 |
Freq Bought Together
Shogun Metafield
A PLATE-LOADED FAVORITE
Bring the intensity of a gym workout home with the Plate Loaded Ground Base Jammer. This popular back machine can be found in some of the most iconic strength meccas around the world and has been a Hammer Strength staple for decades.
CONVERGING / DIVERGING ARMS
The key to the Jammer’s unmatched power transfer lies in its converging and diverging arm path. Unlike rigid, linear pressing arms, this design follows the body’s natural movement patterns, delivering a more athletic, explosive, and functional pressing motion that translates directly to powerful strength performance.
ERGONOMIC HANDLES
The Jammer’s angled, ergonomic handles provide a natural and powerful grip position, reducing wrist strain and maximizing force output. Whether driving through a press or loading up for explosive reps, the handles put the exerciser in total control—allowing for optimal leverage and peak performance.
BAND PEGS
Take your power development to the next level. The built-in band pegs allow athletes to add accommodating resistance, increasing tension through the full range of motion and reinforcing explosive strength at the top of each rep. Perfect for exercisers who need speed, power, and controlled force production.
UNMATCHED SINCE THE '90S
The Ground Base® Jammer isn’t new—it’s legendary. While other companies try to replicate its movement with half-measures, only Hammer Strength delivers the true Jammer experience. Designed in the mid-90s and still dominating weight rooms today, it remains the ultimate training tool for explosive strength.
HOW IT WORKS
Athletes don’t just lift—they drive, push, and explode. The Ground Base® Jammer trains force production in the most athletic way possible, mimicking the powerful pressing movements seen in sport. The Jammer builds the kind of strength that translates to real performance.
HOW IT'S MADE
Hammer Strength plate loaded machines are made with 11-guage steel frames and electrostatic powder coat finish for maximum durability. There are numerous seat adjustments to allow you to find your perfect position and muscle isolation. Molded foam on the cushions provides comfort, support, and durability. All machines have holes in the feet that allow for easy anchoring to the floor.
UNMATCHED SINCE THE '90S
The Ground Base® Jammer isn’t new—it’s legendary. While other companies try to replicate its movement with half-measures, only Hammer Strength delivers the true Jammer experience. Designed in the mid-90s and still dominating weight rooms today, it remains the ultimate training tool for explosive strength.
HOW IT WORKS
Athletes don’t just lift—they drive, push, and explode. The Ground Base® Jammer trains force production in the most athletic way possible, mimicking the powerful pressing movements seen in sport. The Jammer builds the kind of strength that translates to real performance.
HOW IT'S MADE
Hammer Strength plate loaded machines are made with 11-guage steel frames and electrostatic powder coat finish for maximum durability. There are numerous seat adjustments to allow you to find your perfect position and muscle isolation. Molded foam on the cushions provides comfort, support, and durability. All machines have holes in the feet that allow for easy anchoring to the floor.
JOIN THE ELITE
Hammer Strength is entrusted to engineer the most scalable and durable strength training equipment from concept to application. Hammer Strength sets the global standard for design and testing, pioneering movement-based training. Our commitment to excellence is unrivaled so that every athlete can be unrivaled in their training - even from their home gym.
