THREE SECTION DRAWER SLIDES – You will receive a pair of drawer runners: 40 inches in length 3 inches in width and 0.7 inches in thickness. Thanks to the 3-fold full extension design the entire drawer can be extended to its full length. A great helper to make the most of your drawer space fully closed length:40″ fully extended length:80″ HEAVY DUTY STEEL 500 LBS LOAD CAPACITY: Designed with 19mm thick cold rolled steel CRS the drawer runners have a load capacity of 500 lbs. They are sturdy enough to withstand heavy storage without distortion. Zinc plated surface keeps drawer runners rust and abrasion proof. Suitable for goods shelves cabinets industrial drawers recreational vehicles trucks vending machines etc. SOFT QUIET SLIDE WITH LOCKING: These runners feature a locking system for easy control and secure fixing. Unlike those that do not have a lock or only have one our double lock design provides extra security and stability. A double row of ball bearings ensures smooth gliding when using the drawer. Nylon cushion on the middle section runners reduces noise and prevents bounce. THE RIGHT SIZE THAT FITS YOU: Full extension drawer runners are compatible with most types of drawers and cabinets. How to choose the right size of sliders Please refer to the detailed description of each size as the picture shows. It is best to measure the length of the drawer without the frame before choosing our drawer runners. Note: The length of the runners should not be shorter/equal to the depth of the furniture. Installation Use: Heavy duty drawer runners can be installed on the side of the cabinet or on the parts of the machine. All screws and bolts are included for effortless installation. Ideal for new construction renovation and replacement projects such as industrial drawers commercial equipment.