YS Park combs are manufactured from high grade heat tolerant material. Profiled round teeth prevents scratching scalp . Unique patented parting-head tooth allows faster and easy sectioning. 3D ridged spines makes combs easier to hold. The Extra Long Fine Tooth Comb with Cutting Guide features a measure on the spine, allowing you to quickly check the precision of your cuts, while you cut. Based on the YS-335 long comb, the measure is permanently lasered on, and is great not only for education, but for accurately checking symmetry, fringe lengths, and showing the client exactly how much is coming off at the back.