Color: Silver Package contents: 2 x Shield Anchor Eye Bolt; 5 x Expansion Bolt. Only the above contents are included; other products are not. Note: Light and display variations may cause the item color to differ slightly from the picture. The allowable measurement error is +/- 1-3 cm. Overview and benefits - Reliable expansion anchor: When the expansion bolt is tightened, the bolt head expands the metal sheath to fill the hole, creating a secure hold that cannot be pulled out. The bolt moves outward while the metal sheath remains fixed. - Easy installation: Insert the expansion screw into a hole in the ground or wall, then tighten the nuts with a wrench. - Durable construction: Designed for strong fixation in various environments. - Wide compatibility: Suitable for fence installations, burglarproof doors and windows, canopy mounting, air conditioning rack fixation, home decoration, and engineering projects. Working principle - Insert the expansion screw into the ground or a wall hole, then tighten the expansion bolt with a wrench. The bolt extends outside while the metal sheath stays in place; the larger bolt head expands the sheath to fill the hole for a secure, non-removable hold. Use scenarios - Mounting fence posts or rails to concrete or masonry. - Reinforcing burglarproof doors or windows by fixing frames securely. - Installing canopies, light fixtures, or air conditioning racks that require solid anchoring.