C.E. Smith I-Beam Mounting Kit - Allows any Smith guide-on with 1-1/2in square uprights to be mounted on any steel or aluminum I-beam frame. This design is simple to install and can be fitted to the top or bottom of an I-beam. Can also be used as a tie down point. Fits I-Beams up to 4in wide. Kit Includes: 4 galvanized brackets 2 short 3/8in bolts and 2 long 3/8in bolts Select the length needed for your I-beam All the nuts and washers needed.