The HardCORE Guide Assembly is a design by SHUT IT that replaces the industry standard guide rollers. Simply weld a 21⁄2 x 21⁄2” (64 x 64mm) angle iron to your gate and attach the Guide Assembly to the end post. The standard version is ideal for installations that do not have grade variations through the run distance of the gate while the Extended version is ideal for installations that have grade variations through the run distance of the gate.