Hiolit X
Hiolit X is stiffer than Hiolit F and Hiolit J and is recommended for belt sanding and other machine sanding where it has excellent edge wear resistance and durability. In particular, it produces high quality results on challenging materials - for example, grits 36-80 are suitable for aggressive sanding, such as severe rust damage, as well as other sanding operations where large amounts of material need to be removed.