Our 28mm Metro Sliding Door Knob is a sleek and modern hardware component designed for use with sliding doors in both residential and commercial applications. It is made of a heavy 3/4" (19 mm) diameter tubular construction and can be used with glass thicknesses of 5/16" to 3/8" (8 to 10 mm). This knob features a contemporary design and is built to withstand daily use, making it a durable and reliable choice for any sliding door. This knob can be combined with the METRO's sliding door system and other sliding door systems and provides a subtle, feather-touch point of contact for opening and closing the sliding door. It is also easy to maintain and can be cleaned with a damp cloth, making it an excellent choice for homeowners who value both style and practicality. Each package includes a solid brass single knob of your color finish choice, an Allen key for installation, and plastic washers to prevent metal-to-glass contact. *Please note: The knob requires a 1/2" (12 mm) diameter hole in the glass.