Material SizeOur threaded spindle rods with steel core screw ABS plastic, durable and reusable. Solid material that wont crack with pressure, help to make the banister gate fit snug and sturdy, so as to ensure safety of the kids or pets. Package includes 4 pack threaded spindle rods. Size: diameter M10 (10mm), length 80mm. Protection StabilityMake your baby gates more stable and do not failing over. Great way to protect the wall or your stair banisters. Rubber ends to prevent your staircase from scratching, you can mount a baby safety gate on stairs up against a baluster, round pole.Protect your baby and pets. Easy to InstallOur pressure screws for pressure mounted gates can be easily to install into your baby or pet gates without any tools. Do not need to make a hole in the wall, just rotate the nut and create reverse force against wall, quick and easy to fit. Wide ApplicationThis adapter replacement kit pack is suitable for most safety gates and most banisters. Great for baby gates, pet gates, stair gate,child gate,wooden stair gate,etc. Meet your multiple needs. Warm ReminderThis baby gate extension only fit for M10 Spindle Hole, NOT FOR Other Sizes Screws, please check spindle hole of your pressure baby gate first.