Easy installation Complete speed bag mount kit with all hardware included, enabling quick setup and saving time and effort during installation. Size and fit Chassis diameter: 9.5 cm (3.74 in) Mounting hole distance: 5 cm (1.97 in) Mounting hole diameter: 0.7 cm (0.28 in) Designed for standard speed bag brackets. Professional speed bag hardware kit Engineered as a professional grade speed bag bracket to meet the needs of training sessions and professional use in gyms and studios. Quality swivel Built in bearing provides smooth rotation and durable performance over time for reliable operation during routines. Use scenarios Commercial gym or boxing studio: mount multiple speed bags for group interval training with quick setup and stable performance. Training facility replacement: upgrade worn brackets to restore smooth rotation and reliability during frequent workouts. Home gym: install for regular speed bag practice with consistent rebound and easy maintenance.