Metal SUITABLE FOR PRESSURE MOUNTED GATES: The Dreambaby Stair Gate Installation Kit includes 4x 8mm (L) replacement tension bolts. These are suitable for all Dreambaby pressure mounted baby gates including the Ava, Liberty, Chelsea, Dawson & Cosmopolitan ranges EASY TO INSTALL: With no tools needed, our tension bolts are easy to install, just rotate the nut to get the desired force against the wall & you're all set STRONG & STURDY: Our baby gate tension bolts spindle rods are strong & sturdy that can hold pressure and make your gate more stable HIGH QUALITY MATERIALS: Our threaded tension bolts with steel core screws are made from solid premium materials that can handle pressure to ensure child safety PACKAGE INCLUDES: 4 x Tension Bolts, 4 x Tension Knobs, 4 x Mounting Cups, 4 x Adhesive Pads