Wright USA made Octo dumbbells are durable and strong enough for anything you can throw them on. Our Octo Dumbbells feature a 28.5mm shaft with medium knurling. We use special automotive press fit assembly formulas to connect the heads to the shaft for a strong connection on a solid steel head with a crumb rubber coating. The shaft is a 5-inch handle with plenty of room for you hand. We designed the heads to be taller than traditional hexagon dumbbells, so that we can keep the length down. And that gives you the ability to bring them closer together when doing your workouts.
The durable crumb rubber coating gives you the ability to use them on hard surface floors like concreate. The coating dramatically reduces noise compared to iron dumbbells or some adjustable dumbbells. These would be a great addition to any weight room.