Adjustable glass shelf bracket package contains 10 brackets. Adjustable shelf supports is made of zinc alloy. no sharp edges and corners, and the edges are smooth and will not scratch your hands to protect you from injury. Adjustable Shelf Brackets Size: 5.5 x 5 x 2.4 cm / 2.17 x 1.97 x 0.94 in, Anchor Size: 3 cm / 1.18 in, Screw Size: 2.5 cm / 0.98 in, Adjustment range: 3-20 mm / 0.2-0.79 in. Screws to wall with fixings supplied, and then simply adjust the gap between the jaws to clamp it on the shelf with the screws located at the bottom of the bracket. Whether for glass shelves in the bathroom or wooden floors in the living room - the wall mount looks good anywhere and can be used anywhere in the house. Features: Wall shelf brackets add sophisticated style to any room in your home. Convenient adjustable design to suit a glass or wood shelf of various thicknesses. They are waterproof, lightweight and easy to install. Ideal for shower supplies, display collections, organize books or show off your latest treasures. Product Name: Adjustable Shelf Brackets Specification: Material: Zinc alloy Color: silver Quantity: 10 pieces Package Content: 10 * Glass shelf bracket clamp 20 x anchors 20 x screws Notice: Please allow 1-3 mm differences due to manual measurement.