Easy to install You can easily loosen or tighten the screw with a hex screwdriver, connect the clamp and the glass, it can be used without drilling holes in the glass. easy to use. Premium MaterialSquare glass clamp holders are made of premium aluminum alloy, solid, exquisite and durable, corrosion and rust resistant. You can use it with confidence. Practical and beautiful You can fix the glass effectively and securely without affecting the appearance of the glass, the rubber head design can prevent it from slipping. Nonslip design The screw head can lock firmly the glass to prevent skidding, you can also adjust it to make the screw and the glass shelf fit better.Wide UsagePerfect for fixing glass shelves, wine cabinets and showcases, fixing for glass, metal or wood. Widely used in bathrooms, hotels, barber shops, restrooms, public places, etc. Description 1.Adjustable screws can control the clamping distance and lock the glass firmly , and the rubber head design can prevent it from slipping. 2.The square glass shelf brackets are made of premium aluminum alloy with smooth surface, rustproof and weatherproof. wear, which can guarantee the quality and durability. Specification Material: aluminum alloy Color: black Size: 28.5*16*20.5MM,for 810mm Glass Package Include 10* Glass Clamps Note 1.Due to the difference between different monitors , the picture may not reflect the actual color of the product. 2.Due to the manual measurement, please allow a slight deviation of 12mm.