Keystone Retaining Wall System was founded more than twenty-five years ago in Minneapolis, in Minnesota, by Paul Forsberg, an entre - preneur in the landscape field inspired by the idea of a new retaining wall construction system able to conciliate resistance, esthetics and balance with the surrounding environment. The market immediately confirmed the significant results attained by Keystone, consisting in 50 millions of m² installed, 80 owner patents and 50 models available in about 150 distribution points in all over the world. Since 1999 Keystone is part of the Contech Group.
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