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 (4.8 / 5 · 5 reviews)

Scarlett ★★★★★ Aug 19, 2026

The left and right arms move completely independently, which makes unilateral pressing feel way more natural than I expected. Setup on my 4000-series rack took maybe 15 minutes, and the steel is solid enough that there's zero wobble even under heavy load.

Abigail V. ★★★★★ Aug 18, 2026

The independent lever movement on each arm makes cable flyes feel totally different from a fixed bar—way more natural on the joints. Bolted them to my existing rack in under an hour and haven't touched a dumbbell for chest day since.

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.