Extension springs are important components in various mechanical systems, providing the force needed to extend and retract parts. They come in a variety of types and designs, including Extension springs with loop ends, extension springs with hook ends, and custom extension springs. These springs are designed to absorb and store energy, releasing it when the spring is extended or pulled.

    Masonry ties are critical components in construction, designed to connect different elements of a masonry wall or to anchor masonry to a structural framework.  They come in various types, each suited to specific applications.  Common types include brick ties, veneer ties, and wall ties.  Brick ties are typically used to connect brick facades to a wooden or steel framework, providing stability and ensuring that the outer brick layer remains securely attached.  Veneer ties serve a similar purpose but are often used with different types of veneer finishes.  Wall ties, on the other hand, are used to join inner and outer layers of a cavity wall, allowing them to act as a single structural unit.  The choice of masonry tie depends on the specific requirements of the project, including load conditions, environmental exposure, and the materials being used.

Cavity wall ties has good seismic and wind resistance.