Features: Install tips: When installing nuts, use a hand wrench or socket ratchet. Do not use high speed power tools or impact tools to tighten nuts. It is recommended that lubricant be applied during installation to reduce wear. Right to use: Bracket bolts are tightened with a hand tool and threaded correctly. Incorrect handling, over tightening or tightening too fast can cause the nut to wear or stick. Specifications: Material: carbon steel Size: 40 x 120 mm/ 1.57 x 4.72 inches (W x L) Color: silver Package includes: 8 Pieces of u bolts 8 Pieces of frame plates 16 Pieces of hexagon nuts 16 Pieces of round washers Notice: Due to the screen display, the color of the item may differ slightly from the picture. Small items, please keep away from little kids to avoid swallowing. Pointed parts included, please keep away from little kids. Manual measurement, please allow slight errors on size.