Details Double Screws: the Double Screws Make the Railing mid Post More Durable and Stable so That the Glasses Will Not Fall off to Break. Stable Base: the Base Makes the Railing mid Post More Stable and Uneasy to Tilt and Collapse, Which Will Bring Great Reassurance and Safety for You. Thickened Rubber Pads: Thickened Rubber Pads Make Glass Clips Stably and Firmly Connect the Glass so That Glass Is Uneasy to Fall off to Break. Application It Is Suitable for Balcony Guardrails, Attic Guardrails, Staircase Guardrails, Various Indoor Guardrails, Various Outdoor Guardrails, Swimming Pool Guardrails. It Can Only Be Installed in the Middle Joint and Cannot Be Installed on Both Ends.