4.5-8 LB Capacity Heavy-Duty Tool Balancer. Rugged, compact, precision-engineered tool balancers designed to improve productivity while reducing maintenance costs of small tools and operator fatigue. Smooth tension through the full cable length and adjustment knob for tension control ensures the safest, most reliable tool balancer. Keeps tools ready with no lifting and no wasted motion. - Heavy-duty all steel construction - Simple external tension adjustment - Adjustable cable stop for convenient operation - Ready for immediate installation with tool clip - Automatic safety lock - Self-contained main spring - Steel cable with nylon sheath