Premium Construction & Durability: This 150lb(Pair of 5, 10, 15, 20, 25 lb) dumbbell set made from solid cast iron and encased in high-quality virgin rubber, these dumbbells resist cracking, fading, and protect both floors and equipment. Enhanced Grip Safety: Non-Slip handle design ensure secure and comfortable grip, providing increased friction for a more secure grip during exercises. This enhances safety and stability, especially during intense strength training sessions.