2 x single 14 Spinlock Dumbbell Handles with collars Highly durable; this pair of 14 Spinlock Dumbbell Handles feature solid; heavily chromed steel construction. For added safety; they include deep threads which securely lock plates to the handles with a simple spin of the collars. For ease of use; the handles feature knurled grips for a secure hold even when your hands are sweaty. The 1 diameter handles require standard discs. Collars included. 1 year warranty.