Application May be installed as a base leveler where an M10 threaded hole is available for installation. Construction The M10 threaded shaft is steel and the 1 5/16" glide is nylon. How Sold This Base Leveler is sold as a set of 6. Thus, selecting a quantity of 1 will result in 1 set of 6 levelers being purchased. Selecting a quantity of 3 will result in 3 sets of 6 levelers in each set or 18 levelers being purchased.