Usage Tips: REDUCE NOISE and SHAKING:By our headboard stabilizer fixing shake , you can do whatever you want on the bed without shaking and noise. The anti bed shake tool to reduce noise is useful.You can buy it for your sofa also if it always becoming wobbly.^ ADJUSTABLE RANGE: Headboard wall protectors are suitable for the fixation of 1.26-2.71in(32-69mm) gap.The material is made of iron, strong and reliable, can withstand heavy pressure.^ STRUCTURAL PRINCIPLE: Adjustable threaded bed frame anti-shake tools are fixed by strong double-sided tape, the length of the screw can be adjusted to adapt to different gaps, and the EVA cushion is buffered and fixed to reduce noise. Easy to change the stability of your bed frame in just a few mins by simply screwing headboard wall protectors into place.^ WIDE APPLICATIONS: The bed headboard stoppers anti-shake tools can provide support for bed frames, making your bed not easy to shake and make noises, they can also be applied to cabinet, table, book shelves, sofa and other items which against the wall.^ PACKAGE INCLUDING: 4 pack 32-69 anti-shake tools that have been assembled. You don't have to reassemble them. If you need shorter ones, please unscrew the screws and reassemble." It is very easy to operate.