da Vinci Hog Bristle Series 7100 Maestro Artist Paint Brush, Bright Medium-Length Hand-Interlocked with Natural Polished Handle, Size 12 (7100-12) Maestro by da vinci is the world's last hand interlocked hog bristle brush in a complete range of shapes and sizes Hand built and interlocked by skilled brushmakers with the best materials european sizing Made with the natural curve of the bristle turned inwards, two equally sized tufts of bristle are set against each other without tension and made to interlock Other Maestro flat shapes are flat Series 7000, short bright Series 7300 and extra short bright Series 7200, which has a thinner brush head Da vinci's very popular maestro 2 hog bristle is a modern update to the maestro traditional construction