Features: Upgrade sleep security with this nonslip Mattress Gripper, featuring not drill installation and 440lbs weight capacity to prevent mattress/slipcovers from shifting on bed frames, platforms, or sofas. Engineered with metal brackets and noise reducing contact points, this bed frames stabilizer maintains mattress alignment while eliminating disruptive friction sounds during movement. Ideal for families with active children, college dorm residents, and hospitality spaces requiring quick bed setup without permanent modifications. Secures mattresses during activity like kids' playtimes or guestroom, suitable for platform beds, floor mattresses, and sectional sofa cushions. Outperforms plastic alternatives with alloy construction that resists warping across season while adding subtle reinforcement to modern bedroom aesthetics. Specifications: Component: Metal Color: White,Black Size:Approx.140mm/5.51''x130mm/5.12''x50mm/1.97'' Package Includes: 4Pcs Mattress Retainer note: Please allow 1mm errors due to manual measurement. Due to the differences between different monitors, the picture may not reflect the actual color of the item.