| SAT30S description from 2004 Ibanez Japan catalog | 
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The SAT30S is a type of non-locking synchronized tremolo bridge sourced on Ibanez guitars. It is an evolution of the earlier SAT30 tremolo. Features include easily adjustable string height, locking saddles and adjustable arm torque.[1]
The "SAT" in the name stands for "Satellite".[2]