Specification: Material: High Carbon Steels Type: 6mm,8mm,12mm,16mm,19mm Quantity: 1Set(6 Drills) Length: 48mm/1.88\'\' Features: Durable and practical Ideal for Wooden planks,Fiberboard,Particle board,Plywood,Plastic,Alumiumn Board ,etc Suitable for DIY, Home and General Building/Engineering Using Package Included: 1 x 6mm 5 Flute Countersink Drill Bit 1 x 8mm 5 Flute Countersink Drill Bit 1 x 9mm 5 Flute Countersink Drill Bit 1 x 12mm 5 Flute Countersink Drill Bit 1 x 16mm 5 Flute Countersink Drill Bit 1 x 19mm 5 Flute Countersink Drill Bit