Material: The spindle rod is made of high-quality steel core screw and PVC, the surface is galvanized, with good hardness and durability, and can be reused. Protection: The sturdy material will not break under pressure and the plastic end protects the stairs from scratches. Make your baby door more stable and will not malfunction. Design: The top of the snap button of the baby door adopts a Y-shaped design, which can make the bolt and the stair rail more firmly connected. Compared with other baby door lock bolts, it is more suitable for stairs. Easy to install: The fixing bolts of these baby doors are fixed by the pressure between the railing and the safety door, without drilling and other special installations. You can adjust the length as needed. Application: This adapter replacement kit is suitable for most safety gates and most railings, very suitable for baby gates, children's gates, pet gates, metal or wooden staircase gates etc. Specification: Product name: Y-shaped spindle rod Material: Steel+PVC Color: orange + silver Dimensions: 10 mm x 125 mm Thread diameter: 10 mm 1.The Y-shaped design helps the railing door to be firmly fixed on the stairs. 2.Wrapping PVC plastic can protect the stair column and has a non-slip effect. 3.Just turn the nut and apply a reverse force to the railing, you can quickly and easily install. 4.No tools, no need to drill holes on the wall, so the wall will not be damaged and they will not leave marks on your stairs. 5.It is suitable for all pressure-installed baby doors or pet doors, which can prevent babies or pets from leaving the safe area to ensure the safety of children or pets. Warm Note: Before purchasing, please make sure that M10 (10mm) bolts can be inserted into the holes of the baby door. Package: 2 * Y shape spindle rods