ISO Arms

$350 ~~$699.99~~ In stock

The REP Fitness ISO Arms are an optional rack attachment designed to add lever-arm functionality to your home gym. Compatible with Series 4000 and Series 5000 power racks, these arms allow for independent movement on each side, enabling unilateral pressing, rowing, and other exercises.

Compatible with REP Series 4000 and Series 5000 racks
Each arm moves independently for unilateral training
Mounts securely to your rack’s uprights for stable pressing and pulling
Ideal for Jammer-style presses, shoulder work, and accessory movements

Customer Reviews (4.7 / 5 · 3 reviews)

Steven T. ★★★★★ Aug 16, 2026

The lever-arm function completely changed how I do pressing and rows—being able to stop and start at any point in the rep is something I didn’t know I needed. Bolted right onto my series 5000 rack without any wobble, and now I’m hitting angles that dumbbells just can’t match.

Madison ★★★★★ Jul 24, 2026

I’ve been using this for a few weeks now, and the adjustable tension system is a game-changer for my setup. It fits perfectly into my existing rig and feels solid without any wobble. Definitely worth the upgrade over my old gear.

Ellie D. ★★★★☆ Aug 17, 2026

Mounting these was straightforward on my 4000 series rack, and the independent movement on each side finally lets me hit angles a barbell just can't reach. Only gripe is the pins feel a bit snug going in, but once they're seated, the whole thing is rock solid.