1. The knob's surface adopts solid die casting, long-lasting new, smooth surface, no fading, excellent workmanship. 2.The installation base made of quality metal and Ceramic. The base adopt the widen design which is more stable. The mounting hole thread is deeper to install and fasten.3. We provide mounting screws, which can be fit the thickness of the different boards for easy installation. If the screws are not suitable, please prepare your own screws. 4. Our knobs can be used on dresser drawers, kitchen cabinets, and bathroom cabinets. Our decorative knobs will make any furniture look more elegant. 5. These knobs are easy to install. It is chic, practical, and economical, the small drawer knobs have recently been popular for decoration.6. The beautiful door knobs are suitable for the door of the drawer, chest of draws, dresser, cabinet, cupboard, wardrobe, etc. Great gift for new home decoration, furniture renovation and so on. Installation Steps:1. Determine the installation location2. Drilling a 0.16"(M4) diameter hole for screws3. Fasten the knob handle with the screws4. Install finished Specification:Product Name: Ceramic KnobMaterial: CeramicKnob Diameter: 40mm/1.57"Knob Height: 40mm/ 1.57"Ceramic Knob Height: 28mm/1.1"Base Diameter: 30mm/1.18"Screw Thread Length : 61mm/2.4"Screw Rod Length: 65mm/2.56"Screw Thread Dia: 4mm/0.16"Fit for Board Thickness: within 23mm/0.9"Package Content: 1/2/4/6 x Ceramic Knobs, 1/2/4/6/ x ScrewsAvailable Color: Green#3, Yellow#3, Blue, Red#1 Notes:1. Variability of 1-2mm is possible due to the measurement process.2. Due to the screen setting difference, the color of the item may be slightly different from the pictures.