Plastic Material: More safe Ruler Tool for eyebrow worknExcellent softness, Durable for every day eyebrow makeup worknMore accurate for those who are in the beginning stages of the permanent makeup eyebrow, eyeline and lip.nIt can also be served as the usual measurement items, particularly suitable for curved and rounded the perimeter.nIt can help those who usual find no eyebrow position and have makeup spacing problems to get a pair of symmetrical satisfaction browsn