This is a cutting jig for mini 4WD brake sponges. By inserting a blade into the guides on both sides to cut the brake sponge, you can easily cut it at your desired angle. - Recommended blade: Olfa L-size knife (11B) - Material: PLA - How to use: Set the brake sponge in this jig and simply align the cutter blade with the guides on both sides at your desired angle and cut to easily create a clean, straight brake. - Cutting angles: 20°, 30°, 40°, 50° (4 types) - Inner dimensions: W50 x H55 x D5 (mm), groove 6mm (supports sponge thickness of 1-3mm) - Outer dimensions: W70 x H60 x D9 (mm) - Handmade: Due to the 3D printing manufacturing process, we strive to print cleanly through trial and error, but there may be individual differences such as layer lines and small sink marks (like dents) on the back. The product can be used without any problems.