Virtually indestructible and very safe, the Hilton Herbs salt block holder, made to fit our Himalayan Salt horse lick block, is made from one-piece moulded plastic. This holder is reistant to chewing and it won't rust or corrode. The Hilton Herbs salt block holder features scooped sides and short wings for a snug fit. There are two holes for mounting with recessed screws (not included). Will also fit most 2"x4" salt blocks.