Three-section interlocking function :Press and hold the lock handle to unlock and then pull it to the 3-Fold full extension of the slide rail to lock naturally.On the basis of the 3-Fold full extension, pressing the lock handle and continuing to pull it will remove the slide rail for easy installation. Easy to install :On the basis of the 3-Fold full extension, pressing the lock handle and continuing to pull it will remove the slide rail for easy installation.When you finish the installation,reclose the slide rails and you can slide normally. Heavy Duty Material :Ball bearing drawer slides work harden cold rolled steel with zinc plated finish will give you precise thickness and smooth surface.Bearing capacity up to 260 lb per pair. Professional DIY application :3-Fold Full Extension,Side Mount.The slide rail can be disassembled for installation.Suitable for Goods shelf,Mechanical Cabinets,Industry-used drawer,RV,Truck,Vending machine,etc.(The screws are Included.) Warm Tip :Our drawer slides are fitted with Type 304 stainless steel screws for easy installation.The metal pieces are sharp during installation.Please protect your hands.It is recommended to wear gloves for installation.You can contact us at any time if you have any questions, we are always there.Good life.