ITEM NAME:Retractable Spring Balancer Tool Fixtures Holder Strengthen Wall Hanging 3kg-5kg Assembly Line Retractable Spring Balancer Tool Fixtures Holder Strengthen Hanging 3kg-5kg SPECIFICATIONS.(Assembly Line Retractable Spring Balancer Tool Fixtures Holder Strengthen Hanging 3kg-5kg. 1 x Spring Balancer. 1) To enhance work efficiency and reduce fatigue. 2) Remained stable tool position, correct work.