In 1973 Forrest created a set of chocks named Titons which were made in sizes #1 - 10. In 1975 Forrest created four larger sizes of Titons that were a longer extension to the Titon set. The longer Titons were called Chimney Chocks and had only two holes on them for the webbing. Chimney Chocks were numbered #1 - 6. In 1977 Chimney Chocks were discontinued as Forrest introduced larger Titons that were numbered #9 - 17 all having drilled lightening holes and the largest sizes had three holes for the webbing.