ITEM INFORMATION: ItemWeight: 66 lbs Non-Slip Knurled Handles: This dumbbell set features a hard plastic handle with diamond knurled texture on each bar to increase friction to prevent slipping, ensuring the safety and improving coordination of your every workout. Secure Spinlock Collars: Our dumbbell bars with threaded ends and star-lock collars prevent plates from loose or falling, ensuring secure gripping and easy weight plate changes.