Spaceage guideblocks are manufactured from alumina-oxide which is used to make ceramic products for the NASA space program. These guideblocks will create less friction, run cooler, last longer, track better, run quieter, and run smoother than any guide block on the market. This set fits the Delta 20" bandsaw. This is a 4 pc. set and the size is 19/32" x 19/32" x 1".
