Big Horns 109-Inch Straight Edge is a tool every woodworker needs to own! Long enough to mark or cut an 8-foot sheet of plywood diagonally, and fitted with easy to use clamps on each end that slide into position. Made from two identical sections of extra wide extruded aluminum which connect, using a specially designed insert which is long enough to assure a rigid, straight connection. T-slots along both edges allow for use with the Big Horn ProGrip accessories, sold separately. Both clamps can be slid onto one section for convenient marking or cutting of 51-Inch or smaller pieces.