The FIX-3.5X25-PRO is a type of screw anchor manufactured by the Fix & Fasten company. It is made from high-grade zinc-plated carbon steel for durability and rust-resistance. This particular anchor is designed for use in masonry, concrete, and other similar materials. It has a 3.5mm outer diameter and a length of 25mm with a countersunk head for flush mounting. The anchor is designed with a single-start, threaded tip that provides stronger holding power than other types of anchors. It also has a Pro design, which adds extra strength and holding power. It is well-suited for a variety of applications, including light fixtures, cabinets, shelving, and more.