The Bon Double Notch Darby with 2 Knobs in a 42 in. magnesium construction is built for pros who demand accuracy, control, and smooth undercoat application. Featuring serrated edges on both sides, this Darby ensures consistent material distribution during both push and pull strokes. The lightweight magnesium body offers exceptional strength without adding bulk, reducing fatigue on long jobs. Dual knobs provide increased control, especially when working across wider surfaces or at different angles, giving users the flexibility to adjust grip for better balance and efficiency. Engineered with the perfect amount of blade flex, this tool conforms to slight surface irregularities while maintaining a uniform finish. Ideal for plaster, stucco, and concrete work, this Darby is a must-have for finishers looking for professional-grade results with added grip versatility.