Professional retractable spring balancer 1.0-2.0kg capacity suitable to support the weight of the tool to keep assembly, production lines or benches free of clutter. Feature fine load adjustment with hand wheel and clip on multi-strand steel cable for tool attachment. Specially designed to enhance work efficiency and reduce operator fatigue. Retractable spring balancer 0.6-1.5kg capacity (ASTA A-01A), 1.5-3.0kg (ASTA A-01C) and 3.0-5.0kg (ASTA A-01F) sold separately.