Measure and Slice the header rail. Pull the shower door shut and lengthen your tape measure from one facet to one other. Mark the dimensions within the body header and use your hacksaw to cut it to measurement. Smooth down the raw edge utilizing a metallic file.[13] X Investigate resource https://www.deluxeshowerdoors.com/services/glass-shower-door-installation-in-needham-ma-deluxe-shower-doors/