What should I notice?Please choose the right size before purchasing Stainless Steel Quick Link MECCANIXITY Quick Links M10 2.28 Inch Stainless Steel Chain Connector... Threaded Chain Link We are engaged as a Wholesaler Of PP Rope, Turnbuckle Etc. You can turn the screw to lock it, turn the thread clockwise to open, and turn the thread counterclockwise to close. Quick connectors can be attached to chain connectors, backpacks, porch swings, handbags, swings, pet chains, pet, shade sails, fence gate fitness equipment, or chandeliers to play a hanging and fixing role, they can also be used for outdoor activities such as camping, fishing, hiking, travel, etc. Please choose the right size before purchasing. The Quick Links in size of Chain Link Size: 50 x 23., 8 mm / 1., 97 x 0., 94 inch; Chain Connector Wire Diameter: 4., 85 mm / 0., 19 inch; Opening Length: 6., 5 mm / 0., 26 inch; Load Weight: 150 kg / 330., 69 lb; In the package of 5 pcs x Quick Links 6-Pack Quick Chain Link Connector, M10 3/8 316 Stainless Steel D-Shape... Stainless Steel Chain Connector and Chain Buckle for Bicycle/Sewing... Right at $200 total 2 hour install All parts from harbor freight & Lowe's Works perfectly ! EDIT for parts list... One 2 x 8 x 8 cut in a 2 foot section and a 6...