Ceiling Hook Base: Diameter 90 mm, thickness 8mm; Expansion Bolts: length 80 mm, diameter 13.5mm. 

Material: Made of 304 stainless steel, more wear-resistant,rust-proof,corrosion-resistant, durable to use and high load weight capacity, enough to hold 500KG. 

Widely application: Perfect swing set brackets for all indoors or outdoors hanging swing set products, including porch swing set, swinging chair, yoga trapeze, Yoga swing, jungle hammock, suspension trainer, olympic rings, gymnastics set, gym rings, chair gym, gym swing, sandbag swing, punching bags swing, yoga ring.etc 

Easy to install: Use mounting plate securely with bolts into beams, boards, concrete ceiling or any other overhead surface. 

Package list:1x ceiling hook, 4pcs wall anchor bolts