Wood Welded Bolsters have been a staple of the industrial arts department of schools for many years. This block is manufactured with durability in mind. Featuring our patented Wood Welded process this block already has loads of built in strength. But we take it a step further and produce the block with threaded through bolts. This combination of Northern Hard Maple, modern glue technology and hardened steel rods combine to make a bench that will last through years of student use.