The Monouchi is made of hardwood. Stainless Steel rivets dot the shaft, and when they strike, they hurt. The rivets aid in providing better grip on the Nunchaku for high powered hits. The Kusari is made of stainless steel and links at a ball bearing type Hoshi. Overall Length: 30.5 Inches. Monouchi Length: 11.25 Inches (Shaft). Monouchi Type: Natural Hardwood. Kusari Length: 7.75 Inches (Chain). Kusari Type: Stainless Steel Chain. Hoshi Type: Stainless Steel, Ball Bearing (Rivet End). Finish: Red Exterior, Urethane Coating. Design: Stainless Steel Rivet on Shaft.