BOLT SOLID PLATE Higher-tension, main-haulage belts, used in coal, hard-rock mining, foundries, grain elevators, aggregate plants, and steel mills. Easy installation method: Holes are punched in belt quickly and accurately with a templete and boring tool.fasteners are installed on-site with portable,hand, or power tools. Applicable for belt thickness 5-24 or over mm. with material galvanized and stainless steel.