Spring Chest Developer

Spring Chest Developer

Material: ABS Engineering Plastic Carbon Spring
Color: Black Red
Product Dimensions: (Dual-purpose tensioner) 650*110*30mm/25.6*4.3*1.2in, (Triple-purpose tensioner) 680*340*30mm/26.8*13.4*1.2in
Net weight: (Dual-purpose tensioner) 760g, (Triple-purpose tensioner) 1100g
Gross weight: (Dual-purpose tensioner) 760g, (Three-purpose tensioner) 1100g
Scope of application: Fitness
Usage: Mainly train the muscles of the upper body and forechest.
Main efficacy: Exercise arm strength/grip strength/waist strength.