With the Makita 133571-3 chain bar, you ensure steady and precise guidance during demanding timber construction projects. This durable guide bar is specially designed for the Makita 7104L chain mortiser and accommodates chain widths from 15 to 24 mm. Ideal for cutting clean, square mortise and tenon joints in heavy timber beams, roof structures, or restoration work. Replacing a worn bar restores proper chain tension and safe operation, giving you full control and reliable accuracy.