Feature●?【Details】Specification: 3 x 1.8mm; Length needle; Handle diameter: 3mm; Total: 70mm; Grinding head length: 30mm●?【Materials】The products with high hardness of Emery material produced, durability is very high●?【Application】Highly recommended for crafts, hobbies, home repair, jewelry,lapidary use, modeling, and so much more.●?【Warm prompt】For long-lasting use, please use a lubricant when using all diamond coated toolsDescription