These 12" ball bearing practice nunchakus are great for beginners. These are considered speed chucks because they have steel caps with ball bearings and a chain link connecting the chucks. They are foam covered and make for a much safer environment when learning to swing nunchakus. They are ideal for kids taking martial arts classes and need practice weapons. These nunchakus are 12" long with a 1" diameter PVC tube padded with foam rubber. The ball bearings provide a smooth and fast action.