Aoneky Punching Bag Spring, Heavy Duty 300lb Capacity with Vibration Absorption, All-Steel Spring for 100-300 lbs Boxing Bags, Top/Bottom Mount

["Heavy-Duty 300lb Capacity & All-Steel Build - Constructed with industrial-grade all-steel materials to securely hold punching bags up to 300lbs, preventing bending or warping even during the most intense training sessions","Advanced Vibration & Noise Reduction - Features a high-tension coil spring system engineered to absorb shock and reduce noise by up to 70%, protecting your mounting hardware and ensuring a stable, quiet workout environment","Safety-Lock Ends for Maximum Protection - Equipped with fully enclosed, safety-lock steel ends​ that eliminate the risk of spring detachment during use, providing essential security for solo or heavy-bag training","Dual Mounting Options for Easy Setup - Offers flexible top (ceiling) or bottom (bag-to-chain) mounting​ for easy integration into your existing home gym or professional training facility setup","Optimized for 100-300 lbs Standard Bags - Precisely engineered to work seamlessly with standard boxing bag weights (100-300 lbs), maintaining ideal tension and preventing excessive spring stretch for long-lasting performance"]