Manganese Steel Tree Climbing Spikes: Built with heavy duty steel construction and sharp reinforced spikes for reliable traction on rough bark. Designed to provide stable grip and secure climbing performance for professional tree work and outdoor use. Adjustable Sizes: Designed with adjustable sizing from 250mm to 500mm (9.8''-19.7'') for a comfortable and secure fit. Flexible straps help accommodate different leg sizes while improving stability and climbing control. Anti-Slip Rubber Strap: Features ergonomic support with anti-slip construction to help reduce pressure and leg fatigue during extended climbing sessions. Designed for improved comfort, balance, and climbing confidence. 150kg/330lbs Load-Bearing: Engineered to support up to 150kg / 330lbs for dependable climbing performance. Reinforced structure helps provide stability and reliable support while working at heights. Versatile: Suitable for arborists, tree trimming, hunting, fruit picking, logging, and utility work. Designed for demanding outdoor environments requiring dependable climbing equipment.