Product Description: -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. -Our baby gate screws are Y-shaped to better fit stairs and securely attach to them. -This adapter replacement is suitable for most safety gates and most banisters,Great for baby gates, child gate, wooden stair gate, etc. -This item is only applicable to the M10 spindle hole, please check the spindle hole of the pressure baby door first. Specification: Material: Steel Color: Black+Silver Size: 125x68mm/5.0×2.7inch Quantity: 4 Pieces Package Includes: 4 x M10 Spindle Rods Notes: 1 to the light and screen setting difference, the item’s color may be slightly different from the pictures. 2se allow slight dimension difference due to different manual measurement.