【Versatile 2-in-1 Training System】Hezeyferg adjustable dumbbells set ingeniously integrates a unique kettlebell converter to form a multi-functional weight set. Smoothly switch between modes in just seconds with a simple click. 【Flexible Weight Mechanism】Each weight dumbbell allows customizable weight options (2.2-5.5lb) using adjustment block (each 0.55lb). Use a dumbbell or two dumbbells to pair with the 1.1lb converter(wights 3.3-12.1lb) for strength training at different stages. 【Precision Locking Technology】The weight block of the adjustable dumbbell features a rigorously tested dual-button release system to deliver secure connections. The reinforced latch on the kettlebell converter maintains rock-solid stability during workouts. 【Portable & Space-Efficient Design】This space-saving design of the weight dumbbell set goes wherever you train — at home, in the office, or outdoors. Also, the square hand weights will not roll around for security. 【Full Body Workout】Choosing your desired dumbbell weights and form to do full-body workouts or targeted muscle training. Note: Align the dumbbell's gray button side with the converter's front orientation. UPC 691303532161 ASIN B0FM79VK5C Color Blue Style Adjustable Material Acrylonitrile Butadiene Styrene (ABS) Set Name Hezeyferg Adjustable Dumbbell Set Brand Name Hezeyferg Unit Count 1.0 Count Item Weight 12.1 Pounds Part Number D-03K Manufacturer Hezeyferg Model Number D-03K Handle Diameter 1.2in Handle Material Acrylonitrile Butadiene Styrene Number of Items 4 Number of Pieces 3 Item Dimensions L x W 7.3 L x 3.15 W Other Special Features of the Product Adjustable Weight