Green Stuff World 1650 Scratch Brush Set A set of brushes for scratches With the different types of tips available in this Scratch Brush set, these tools are ideal for difficult cleaning tasks, as well as creating different wear and scratch effects on your dioramas, among others. Very practical and comfortable to hold. These pen-shaped brushes come with 5 different types of tips for different applications, namely: Brass , Fiberglass , Soft Nylon , Hard Nylon , and Stainless Steel . The tips are retractable and interchangeable, so you can extend or retract them by simply turning the rear head. They are great for removing putty or polymer clay residue from textured tools or rollers. They are also used for various finishing techniques, such as mediums or liquids for spraying, varnish spraying, etc. The metal tip increases durability. Total length: 12 cm (4-1/2 in) * Replacement parts for these tips are available separately.