Thank you for viewing! This is a **spring-loaded arm bar (arm strength training device)**. ・Adjustable strength with 5 springs (30kg-70kg) ・Ideal for upper body muscle training, especially arms, shoulders, and chest ・Used item, but the springs show no deterioration or damage and are still usable There is some dirt due to outdoor storage, but it does not affect use. Recommended for beginner to intermediate trainers! ⸻ Shipping Will be shipped with simple packaging. Instant purchase OK, first come, first served!