Replogle #14 spider bridges are highly refined cast aluminum spiders in the 1928 design tradition. The vintage 1928-style aluminum alloy makes this bridge flexible enough to deliver classic resonance and musical tone. This is the legendary #14 spider sound that hearkens back to the great pre-war resonator guitars. After individual hand-forging in the “Old School” way, the spiders are then hand arched. Each leg of the spider is hand-adjusted and then hand-leveled so the resonator guitar will sound its best- this hand detailing helps optimize contact on the guitar's resonator cone, to bring out the best tone and volume