The Black Iron Strength Custom Dumbbells are 100% solid steel. The 25 ton press through construction makes these dumbbells a one piece unit with no welds or bolts. This is quite simply the most advanced and maintenance free dumbbell available. The premium zinc coating will last two to three times longer than our competitors baked on paint finishes. Our custom engraving feature will enhance the appearance of any weightroom. There are three (3) handle choices to choose from. Our standard custom dumbbell is the cradle collar handle with a 1 1/4 inch diameter handle and has one 2 inch steel collar on the inside of each head to help the user center their hand on the gripping area. This gives the user better balance and control. The custom thick handle dumbbell is 1 3/4 inch in diameter and is the favorite for football and men's basketball. Men with large hands will be able to grip better with this handle since they have more surface area of their hand in contact with the handle. The custom Hextour handle is 1 1/4 inches in diameter and is the number one choice for beauty bell handles. The Hextour set (20 pairs) goes from 5 lb. to 52.5 lb. in 2 1/2 lb. increments. This set is also ideal for a women's only facility.