Glass Door Rails ASSA ABLOY Glass Door Rails offer ease of installation with dependable quality. These pre-assembled mechanical rails have a variety of fabrication options to create a customized solution that fits any glass door application. Square 2-3/4" Glass Door Rails (DRS-275) Tapered 2-3/4" Glass Door Rails (DRT-275) Square 4" Glass Door Rails (DRS-4) Tapered 4" Glass Door Rails (DRT-4) Square 6" Glass Door Rails (DRS-6) Square 10" Glass Door Rails (DRS-10) Square 9.5" Glass Door Patch Rail (DRS-4PR) Tapered 9.5" Patch Rails (DRT-4PR)