premium 2pcs winding bars with non-slip handle 1/2 inch in diameter x 18 inch in length,used for garage door torsion spring zhent product description<br> zhent non-slip garage door spring winding bar is an upgrade tool after searching many problems customers may meet in daily use,compared to normal winding bars,our bars have non-slip handles and<br> colored end to ensure it is inserted to the full depth.premium 45 steel and heat hardened technology,make our bars quite sturdy.choose our product,and it will save you over $100 bill from a garage door company.<br> technical specification<br> brand name:zhent<br> sku:zt-002<br> length:18 inch<br> material:45 steel<br> weight:2 pounds<br> diameter:0.5inch<br> surface treatment:zinc plated<br>