High-quality material: The chuck screws are made of steel core screws and ABS plastic, which are durable and reusable, do not harm children and pets, and can be used without any problems. Dimensions: 125 x 68 x 20 mm. Y-shaped design: Our baby gate screws are Y-shaped so that they can better fit the ladder and stay securely on the ladder. This is a great way to protect your walls or stair railings. Easy to install: No tools required for installation. It will not damage the wall and installs quickly and easily by simply turning the nut and creating force directly on the wall. Wide ApplicationSpindle rod is suitable for most safety gates and railings, perfect for baby gates, pet gates, stair gates, baby gates, wooden stair gates, etc. Note: The data are all measured manually, please allow 1-3cm error, due to differences in light and display, there may be some color differences, please refer to the actual item received.