812pcs High-Difficulty Metal Assembling Dragon Hunting Crossbow Model Kit For Adults. The Metal Pieces Are Fixed With Screws To Ensure High Precision. Composed Of Stainless Steel Metal Sheets And Plastic Gears, This Set Of Metal Building Blocks Can Launch Small Particles After Assembly, Making It Challenging And Suitable For Experienced Hobbyists With Assembling Skills. The Completed Work Will Provide A Great Sense Of Accomplishment.