MPLS3 Three-Point Locking System


Fight corrosion and forceful entry with Quanex Building Products’ Imperial MPLS3 stainless steel three-point locking system designed to withstand the elements and work in tandem with quality weather-stripping products.
The MPLS3 locking system is made of 100-percent stainless steel to provide durability, corrosion resistance and security. It is engineered with a locking “tongue” system that works in opposing directions that provides a secure lock and lasting weather-stripping compression. Our unique screw supports prevent the face bar from flexing, encouraging easy installation and smooth operation for the life of the product.



  • Brushed nickel
  • Oil-rubbed bronze
  • Brass


  • Standard size accommodates 3.62” (92mm) hole spacing from the center of the spindle to the cover of the key cylinder
  • Available with a 45mm backset with 16mm euro groove, and can be ordered in either 6’8” or 8’ pieces that can be trimmed to accommodate custom sizes
  • Durable and corrosion resistant
  • Works seamlessly with Quanex’s Imperial weather sealing products
  • Easy to install
  • Versatile sizes and finishes to accommodate any taste