The york commercial 2 x 25kg 55lbs rubber hex dumbbells utilise rubber coated heads that ensure safety for surrounding equipment and flooring the heads are also torque threaded to provide permanent fixing to the handles an anti roll safety design prevents the dumbbells from rolling away when set aside they also have chrome plated knurled steel handles for a secure and comfortable grip the york dumbbells are perfect for performing biceps curls lateral or frontal movements that challenge