These RaceQuip seat mounting brackets are steel construction and can be used to mount the seat between 1 inches and 4 inches in height. The brackets allow for a 0° Upright seating position up to a 30° Layback position. Steel seat mounts have a durable black powder coated finish and weigh 4lbs. Bases are drilled with 5 different locations front and rear to accommodate a wide variety of floors with no additional drilling.