Build 4 different blaster and target models in one set with the K-20X; Fires up to 75 feet; Set includes 165 KNEX parts, including rods, connectors plus special parts to create different blasters: 1 blaster chamber, 2 skull dart holders, 1 quick fit grip, 1 preload ring and 5 foam darts. In addition to the main K-20X model, you can download instructions for 3 alternate blasters and buildable targets. Compatible with the entire K-FORCE Build and Blast line. Perfect for builders aged 8 and over. Build the k-20x customisable blaster for blasting action; Each dart fires up to 75 feet; Includes 5 foam darts and over 160 knex pieces to create awesome blasters; 4 blaster and target building ideas, most models can be built one at a time. Includes a blaster chamber, quick fit grip, pre load ring, 2 skull dart holders and 5 foam darts. Size H22.86, W5.08, D40.64cm. For ages 8 years and over. WARNING(S): Not suitable for children under 3 years old. Only for domestic use. To be used under the direct supervision of an adult.