Nucleus SBX Dumbbell SetsNUCLEUS SBX DUMBBELLS Another cost effective alternative to the new Escape free weight range, these SBX dumbbells still feature the same patented Dual Lock Plus process, splined press fit at three tones and are full penetration welded. DESIGN. Get creative with their workouts using this cost effective entry to the Nucleus range. Recessed edging gives increased variability for grip options in addition to using the traditional handle. TECH SPEC. These