*IMPORTANT! PLEASE SEE THE SIZING CHART INFOGRAPHIC BEFORE BUYING. MID WEIGHTS DO NOT FIT MOST HEX STYLE DUMBBELLS UNDER 25 LBS. AND MOST ROUND STYLE DUMBBELLS UNDER 10 LBS.* PRECISELY WEIGHTED: our 4-Piece weight add-ons for dumbbells contains four 1.25 lb micro plates that were designed with accuracy in mind with a tolerance of +/- 6 grams. Expertly crafted for a secure fit on most dumbbells, these micro weight plates were made to enhance your existing fixed end dumbbell and barbell sets. Apply one weight for a 1.25 pound adjustment or complement with another plate for a full 2.5 lb increase for each dumbbell. DURABLE DESIGN: Our fractional weights are made from a solid steel disk encased in a strong 100% silicone outer body, highlighted with a long-lasting protective coating. Each dumbbell attachment is small at 4.75" Inch in diameter and only.75" thick, allowing for minimal protrusion at the end of the dumbbell. The connecting straps on these micro weights