Professional Film Leader Retriever. For easy usage instructions, please refer to How to Use: on this product page. If you are looking for an easy way to use this product, you can find related videos online: Search keyword 'film leader retriever'. Top quality, very easy, safe, and reliable film retriever for 35mm cassettes. Extracts the end of 35mm film when the film is fully rewound into the cartridge. Please read the product manual carefully before use! Dimensions: 4.92 x 1.89 x 0.39 inches.