Brand Name:Timistory Size:Diameter length 2.35mm Material:Stainless Steel Model Number:Nail drill Type 1:9 Type Silver Tungsten Carbide Nail Drill bits Type 2:6 Type Rainbow Tungsten Carbide Nail Drill bits Type 3:5 Size Black Ceramic Drill bits for Nail Type 4:5 Size Blue Ceramic Drill bits for Nail Type 5:3 Size White Ceramic Drill bits for Nail