These are manufactured components, typically constructed from various plastics, designed to create separation or maintain a specific distance between objects. These items are commonly available for purchase at large home improvement retailers. For instance, these can be used to provide clearance between a wall and a picture frame, or to elevate an appliance slightly off the floor.
The utilization of these components offers several advantages. They prevent direct contact between surfaces, which can reduce wear and tear and minimize the risk of damage from moisture or vibration. Historically, materials like wood or metal were employed for similar purposes; however, the plastic variants offer increased resistance to corrosion and often a lower cost point. Their widespread availability through established retailers simplifies procurement for both professional contractors and homeowners undertaking DIY projects.