The york commercial 2 x 175kg rubber hex dumbbells are perfect for the athletes who want to improve strength gain more power and tone the muscles their heads are encased in rubber to enhance quality and protect the floors and surrounding equipment the heads are torque threaded and attached to a thick 35mm robust steel shaft for improved strength and durability the dumbbells also have ergonomically shaped knurled handles that ensure a strong and easy grip they are sold in pairs and design