BULL’S Martin Schindler Darts – Steel Tip – Brass – 21g. Improve your accuracy and precision with BULL’S Martin Schindler Darts. Made from high-quality brass with coloured rings, these steel tip darts are endorsed by professional player Martin Schindler. Elevate your game and dominate the competition with these 18g darts.BULL’S Martin Schindler Darts – Steel Tip – Brass – 23g. Improve your accuracy and precision with BULL’S Martin Schindler Darts. Made from high-quality brass with coloured rings, these steel tip darts are endorsed by professional player Martin Schindler. Elevate your game and dominate the competition with these 18g darts.