The TRS-101 is a double locking tremolo bridge. It is produced in Japan by Takeuchi Manufacturing based on a design licensed from Floyd Rose. It came equipped on several Ibanez electric guitars. It is sometimes referred to as the TRS101 (without the hyphen).
The TRS-101 is a double locking, floating tremolo with die cast saddles. The bridge is stamped and then hardened using heat treatment. It uses a traditional system of three springs and a claw to counteract string tension and return the bridge to the original position to maintain tuning stability. The design also relies on a locking nut.
The TRS505 is a similar tremolo with a single locking design where the strings are retained at the saddles using the ball end. The Lo-TRS is a slight redesign of the TRS-101 which offers a lower profile. The TRT-1 is a similar, slightly cheaper version.
The TRS-101 has been used by several other manufacturers besides Ibanez, including Yamaha, Washburn, Jackson and Fernades. It is available in black, chrome and gold finishes.