Easy installation: Complete Speed Bag Mount Kit for quick setup. Includes the hardware needed, saving time and effort during installation. Professional grade design: A speed ball bracket built for professional use, meeting the needs of both training exercises and professional users. Size specifications: Chassis diameter 9.5 cm (3.74 in); hole distance 5 cm (1.97 in); hole diameter 0.7 cm (0.28 in). Durable material: Speed Bag Swivel is made of metal, heavy duty, and designed to withstand the constant punching and kicking of a speed bag for many years; sturdy construction. What you get: Hardware required for installation is included with the kit. Use scenario 1: In a boxing gym or training facility for frequent speed bag workouts that demand reliable, durable mounting. Use scenario 2: In a home gym or studio where quick, secure setup is valued and longterm reliability is important. Use scenario 3: As a replacement or upgrade in professional training rooms or performance centers that require a rugged, professionalgrade speed bag bracket.