Specification Brand : AOLISHENG BulletPoint1 : 【 Undermount & Soft Close 】 Drawer slides are placed on the bottom of the drawer. But screws are mounted on both sides of the cabinet.The self-closing drawer slide rail adopts a new copper hydraulic buffer double-spring structure, thus reducing noise when closing the drawer. (NOTE: Complete pair for face frame or frameless application. Refer to the video attached to the link for specific installation details.) BulletPoint2 : 【Full Extension & Detachable】 It's approximately 2 times in length when the slide is fully extended, which means you can completely pull out your drawer installed with our drawer slides. You can squeeze two red handles on the locking mechanism in the meantime. And then pull up the drawer. The 3rd fold of slide is detachable, which is convenient for installation and maintenance like cleaning the drawer. BulletPoint3 : 【Purchase instructions】 This is undermount soft close drawer slide. The maximum thickness of the side panel of the applicable drawer is 16mm (5/8″). Clearance between slides with cabinet: 20mm (0.78inch)- 40mm (1.58inch). Drawer length:533mm (21"), cabinet depth: about 560mm (22.04"), please choose 21" drawer slides. BulletPoint4 : 【Stable & Smooth】 AOLISHENG undermount drawer slides has excellent anti-rust and mute function, and there are two rows of solid steel balls inside, which can bear weight and be quiet. After testing, the number of times the slide rail is opened and closed is more than 150,000 times. BulletPoint5 : 【After Sales Service】Our service tenet is: customer first. Any quality or installing problem please feel free to contact us. Package includes: drawer slides (2pcs), adjustable locking device (2pcs), rear mounting brackets (2pcs), mounting screws (32pcs), installation instructions (1pcs). Color : 1 Pair DrawerType : Ball Bearing Slide FinishType : Steel IncludedComponents1 : Undermount drawer slides IncludedComponents2 : Rear mounting bracket IncludedComponents3 : Locking Devices IncludedComponents4 : Install Screws IncludedComponents5 : Installation instructions ItemName : AOLISHENG 1 Pair Undermount Soft Close Drawer Slides 9 12 15 18 21 24 Inch 80 lb Load Capacity Full Extension Ball Bearing Hidden Bottom Mount Rails Locking Devices Concealed Runners ItemPackageDimensions_Height : 57.15 centimeters ItemPackageDimensions_Length : 5.715 centimeters ItemPackageDimensions_Width : 8.001 centimeters ItemTypeKeyword : cabinet-and-furniture-drawer-slides Manufacturer : AOLISHENG Material : Q235 cold rolled steel ModelName : MK316 ModelNumber : MK316 MountingType : Under Mount NumberOfItems : 2 PartNumber : MK316 ProductDescription : Product length: 229mm-610mm(9-24") ProductSiteLaunchDate : 2022-12-16T03:34:13.263Z Size : 21 Inch SupplierDeclaredDgHzRegulation : not_applicable