Premium Material: Our threaded spindle rods feature a steel core screw & ABS plastic, making them durable and reusable. Safe for children or pets. Safety and Stability: These pressure screws make your baby gate more stable and prevent malfunctions. A great way to protect walls or stair railings, the rubber ends prevent scratches on your stairs. Easy to Install: Our threaded spindle rods have adjustable length screws and require no tools, so you won't damage your walls. 4-Pack Threaded Spindle Rods: Size: diameter M10 (10 mm), diameter 80 mm, diameter 35 mm (1.38 inches), only suitable for M10 spindle holes. Not for 8 mm screws. Color: White Feature: 1. This gate adapter is quick and easy to assemble without tools. 2. Make sure the hole in your baby gate can insert M10 (10 mm) bolts before purchasing. 3. Protect your wall, door, stairs, railing from being damaged by pressure gates or dog gates. 4. Spindle rods Color: White Material: Steel core screw + ABS plastic Size: M10 * 8 cm between the adjustment wheels and the rubber foot. 2, Insert all 4 threaded spindle rods into the holes in each corner of your baby gate. 3, Place the gate and make sure it is level and centered in your doorway or opening, then rotate the adjustment wheels located on the threaded spindle rods to make it a right situation. Warm tips: Make sure the hole in your baby gate can insert M10 (10 mm) bolts before purchasing.