Manufactured from high grade HG-STEELTM, RDX ball bearing steel swivel provides stability and resistance to corrosion, to last a lifetime. Its ergonomic design uses professional mechanics which keeps it stable even after quick action. Red oxide primer coating protects the steel from rust and corrosion. Low friction ball bearings combined with low weight swivel provide smooth rotation for the attached punch bag. The swivel is made more secure through master link assembly to keep the ball safe from thefts. [PROFESSIONAL MECHANICS] This speedball swivel is designed using professional mechanics to allow lightening quick action without any effect on its position. The top quality ceiling mount has a reduced center hub which offers speed, precision, balance and durability making it perfect for sparring and training purposes. [HIGH GRADE HG-STEELTM] RDX ball bearing swivel is manufactured from high grade HG-SteelTM known as the best steel due to their outstanding holding strength, prime fixture stability and resistant to corrosion properties, making this sturdy ceiling hook last a lifetime. [ANTI-RUST FORMULATION] Our speedball hanger is treated with a solution of red oxide primer which is used as a base coat for metals and steels in order to add a layer of protection to the its surface as an anti-corrosion coating to stop the formation of rust. [LOW FRICTION BALL BEARINGS] Superior quality low friction ball bearings combined with low weight swivel provide smooth rotation of the attached speedball. The ceiling hook thus allows quick and enhanced ball movement to test boxers and their limits. [QUICK & SECURE MASTER LINK] RDX steel swivel is made perfectly secure through master link assembly keeping the speed ball secure and thwarts thefts. The quick release pin design provides an ease of access and convenience of removal of punching bag.