Material: Our crystal buttons are made of crystal glass. The crystal knobs screw material is zinc alloy for solid construction and a shiny, classic look Dimensions: The knob is about 30mm in diameter, about 30mm in height and a base diameter of approximately 15mm. These crystal drawer knobs can have a magical effect when decorating a room Easy to install: Mark the position on the board where you want to install it, then drill a hole on the board , guide the hole with a screw, tighten the screw to fix the button in place Application: The crystal button is very pretty, artistic and durable. Ideal for cabinets, dressers, drawers, wardrobes, shelves, etc. These drawer knobs shine under the light and reflect different bright colors, making the room more decorative and elegant Package Content: The package contains 30 crystal knobs and 30 screws. Screw Size: Diameter 0.4cm Length 2.5cm