The PRB-4401-LCO is a left-handed set of RATIO calibrated machine heads for BASS that utilize a 4-in-line configuration. In order to achieve higher gear ratios, Ratios are the world’s first machine heads to use a double-shell gear design with hardened steel gearing. Surprisingly smooth and super strong.

Specifications

• Gear ratio: unique for each string position – one turn-one tone
• Required dowel hole diameter: 0.720″ (18 mm)
• Rope post diameter: 0.547″ (13.9 mm)
• Length from rope post to rope hole: 0.807″ (20.5 mm)
• Weight per machine head: 3.5 oz (99.3 g)
• Weight per set of four: 14 oz (397 g)
• Rope diameter up to 130 gauge
• Includes 4 machine heads, mounting screws and sockets