1 2 expansion anchor

A 3 8 full threaded rod, often referred to as a fully threaded screw or all-thread, is a long, cylindrical object with threads running along its entire length. The 3 8 in the name refers to the material grade, which typically signifies a stainless steel alloy, specifically Type 308. This grade is renowned for its excellent corrosion resistance and high-temperature strength, making it ideal for use in environments prone to rusting or where heat resistance is crucial.

...

A butterfly plastic toggle anchor is essentially a two-part system consisting of a plastic body and a metal toggle. The plastic body, often made from durable materials like nylon or polypropylene, serves as the anchor point, while the toggle acts as a stabilizing mechanism that spreads the load behind the wall. The butterfly shape of the toggle allows it to open up once inserted into the pre-drilled hole, providing a secure grip on the inner surface of the wall.

...