Product Specification: Knobs Material: ABS and Crystal Glass Screw Material: 304 stainless steel Crystal Glass Size: 1.18x0.82x0.78 in/3x2.1x2 cm Knob Height: 21mm(0.82 inch) Base Size: 20×20MM/0.78x0.78 IN Installation Steps: Find the position where you want to install on the board and drill a hole. Then pass through the screw from the back of board anf thread tight to the knob. Package include: 4 * drawer knob handle 4 * screw Note: - Suitable for board thickness about 15-20mm/0.59-0.78 inch. Warm tips: 1)The real color of the item may be slightly different from the pictures shown on website caused by many factors such as brightness of your monitor and light brightness. 2)Please allow slight deviation for the measurement data. 3)Normally we will ship in 1-3 days according to your order status, and it will take about 2-3 weeks to arrive at your side. 5110)We always provide high quality service for the customer. Any questions, please feel free to contact us.