PBS-G1 Ballast Spreader for G & 1 Scales (45 mm / 1.772 inch)For G and 1 Scale (45 mm 1. 772") tracks. Lay meters of ballast in just a few minutes! Perfect ballast spreading is never problem again with this easy to use tool. Slots underneath the spreader keeps your ballast in line, spreads the ballast on track and never on rails. Works perfect on straights and curves. You can use on all G and 1 scale tracks.