• 72-piece kit designed for stained glass panel making • Includes 12 aluminum alloy positioning blocks in 3 sizes: 3, 6, and 12 inches • 60 mixed color clips for secure and visible fastening • The aluminum blocks are sturdy, wear-resistant, and easy to fix thanks to their small holes • Allows you to maintain the position of the project edges without them shifting easily • The clips have steel tips and plastic heads, making insertion and removal easy • Suitable for most workbenches and adaptable to different stained glass projects • Improves the quality and efficiency in the creation of colored glass works • Ideal for both beginners and experienced users in glass crafts • The block system can be applied to various work panels, offering practicality and speed • Perfect for attaching papers, photos, and other items to cork, foam, or paper panels