[Safe and Reliable & Easy to Install] Our ceiling hooks are made of high-quality metal and offer maximum rust and corrosion protection, safely supporting up to 450 kg with a high-quality welding process, suitable for indoor and outdoor installation. We have pre-drilled two holes for screwing into wood or concrete, can be installed in minutes. [360 Degree Rotatable Design] Design with a strong heavy-duty hook, the hook can be rotated 360 degrees and swung back and forth 180 degrees. Makes the hook more flexible, but less shaky. For safety, we have installed a metal O-ring to prevent the shaft from slipping out. The hook buckle is also strong enough for safety. [Pure Relaxation] The hammock chair swing spring kit allows you to swing, sway and turn smoothly and comfortably and see your suspension through shock absorption. With the steel spring, you can redesign your hammock chair and the most sophisticated seating option. [USER-FRIENDLY] Ceiling hook hanging chair set with two pre-drilled holes for screwing into wood, wooden beams or concrete. Mark the mounting holes with a pen and then drill them with a drill. Tighten the expansion screw or wood screw and hammer it in. [Versatile Use] Professional ceiling mount and spring Perfect for hanging chair, hanging lamp, swing, love swing, hammock, punching bag, sling trainer, yoga towel, awning, sling trainer, hanging chair, hanging cave, hanging seat. Color: Black Material: Metal Package contents: 1 x Ceiling hook 1 x Carabiner 2 x Expansion screw 2 x Screw The above package content only, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The allowed measurement error is +/- 1-3 cm.