7 PCS Titanium Coated Countersink Drill Bit Set Ideal Carpentry Reamer Tool Set for furniture assembly, house maintenance, DIY work and other home use;Great Tool for Hobbyists, Modelers or for Professional use, such as Builders and Electricians etc.PACKAGE INCLUDES:7 PCS Titanium Coated Countersink Drill Bit Set: 3mm, 4mm, 5mm, 6mm,7mm, 8mm, 10mm; APPLICATIONS:Apply to wooden planks, fiberboard, particle board, plywood, plastic, aluminum board, PVC board and more;PRODUCT SPECIFICATIONS:MATERIAL:High Carbon SteelSURFACE TREATMENT:Titanium Coating [WARM NOTE]- Recommend to use on table mounted drill. Due to the unfixed drilling center of hand drill, bits may break during drilling if they are applied on hand drills.