Quick and easy to use when setting height of your bearer. Ideal for use on areas where the ground has a ?fall?, to provide a level bearer height. Provides a ?bottom of bearer? height from *160mm to 290mm. ? Quick and easy to use when setting height of your bearer. ? Ideal for use on areas where the ground has a ?fall?, to provide a level bearer height. ? Provides a ?bottom of bearer? height from *160mm to 290mm.