Yes4All Cast Iron Ruck Plate, Weighted Plate for Rucking, Swings, Squat, Strength Training – Multiple Weights: 10LB to 45LB

HEAVY-DUTY CAST IRON RUCK WEIGHT: Constructed of heavy-gauge cast iron and covered with a Black paint coating finish, Yes4All ruck weight stands for years without corrosion or breaking apart.
WIDE, SMOOTH HANDLE: Our plate features a wide grip handle to easily add and remove it from your ruck. The smooth, high-quality handle of the Ruck Weight provides a comfortable and secure grip during your workout.
ERGONOMIC, ROUNDED EDGE: Each Ruck Weight is specially designed with four rounded edges to fit into standard laptop compartments or elastic interior pockets. Plus, the smooth-edge design protects the floor and surrounding equipment from damage.
GREAT FOR RUCKING AND MILITARY TRAINING: Adding ruck weights to your jogging or hiking is a great way to burn calories, improve aerobic endurance, build up strength and muscle mass, making you less injury prone.
STRENGTHEN YOUR HIP AND POSTURE STABILITY: The weight of the backpack pulls your shoulders and back into a proper alignment. As your upper body adapts to rucking, it becomes more comfortable to maintain that proper posture in your daily life.