The design of the wall reaction force principle, no additional installation tools, no holes in the wall, simple installation. The surface of the screw flat is provided with anti-slips glue to increase friction and prevent abrasion of the wall surface. Stable and safe. Smooth bolts are easy to install, not easy to fall off. Features -Color:Orange -Material:Steel, ABS -Size:8.00X3.50X3.50cm/3.14X1.38X1.38in -Note: M10 -Threaded spindle rods are great for banister baby gate, pet gates, stair gate, gate, etc. -Made of sturdy material, these pressure baby door screws are durable and stable enough to last long enough to keep your baby and pets safe inside the stair door. -Easy installation: no drilling or any tools required. Simply rotate the nut to the to lock gate tightly. - The smooth head of the screw prevents scratching walls or stairs. Do not need to worry about this problem. - Suitable for most mounting pressure doors such as baby safety doors, dog doors, stair doors. Suitable for family, pet store, pet hospital, kindergarten, etc. Package list: 6 x Baby Gate Threaded Spindle Rod