Solid Steel Dumbbells carry a lifetime guarantee against breakage. Featuring a 32mm, Hard Chrome Handle with a Medium Knurl. Barbells are made with 30mm, Hard Chrome Bars. The handles (or Bar) are press-fit into the steel head, chamfered and welded on the face of the slug and then fully machined. This unique INVISA-WELD™ process eliminates an inside weld, thus creating a stronger more resilient design. Solid Steel Dumbbells available 5-150x5 lb. increments and 7.5-52.5x5 lb. increments. Rubber Encased Dumbbells available 5-125x5 lb. and 7.5-52.5x5 lb. increments.