Dual-Lock: ELIMINATES LOOSENING that occurs in a single bolting assembly or welding assembly system. This patented technology incorporates two sets of bolting threads that interlock when tightened. The Dual-Lock handle or bar becomes a bolt when it screws into the head of a dumbbell or barbell and then becomes a nut when another bolt is screwed into the handle or bar from the opposite direction. Each bolting thread blocks the other from rotating and loosening even in heavy impact environments. The Dual-Lock is Unsurpassed in Achieving Structural Stability.
Dual-Lock: ENABLES THE USE OF HIGH STRENGTH DUMBBELL HANDLES. The high strength is achieved by heat treating alloy steel. However, the heat created in weld processing will anneal (weaken) the material. Dual-Lock technology eliminates the need
for welds in dumbbell assembly so The Strength of Our Dumbbell Handles is Never Compromised.
Dual-Lock: UMAX CUSTOMERS BENEFIT BY PAYING LESS FOR BETTER PRODUCTS. Without welds and internal
"forced" fastening mechanisms, this technology allows our dumbbells and barbells to be assembled from finished modular components that are already fully urethane encased or hard chrome plated. This reduces production cost and material loss compared to other assembling methods.