ITEM NAME:8 Pcs High Speed Steel Countersink Drill Bit Set Woodworking Chamfer Reamer Description: Made of premium high speed steel, solid, high quality, durable Three tapered points design, sharp, easy to use, efficient Chamfer is 5 flutes, can discharge the wood more rapidly Drilling length can be adjusted for various length screws simply by loosening and tightening the setscrew Great for woodworking Specification: Material: HSS Color: As Shown Size Chart: 4 Pcs Set: Diameter x Length: Approx. 3x60mm x 1 4x75mm x 1 5x85mm x 1 6x93mm x1 Wrench x 1 7 Pcs Set: 3x60mm x 1 4x75mm x 1 5x85mm x 1 6x93mm x1 7x100mm x 1 8x110mm x 1 10x120mm x 1 Wrench x 1 8 Pcs Set: 3x60mm x 1 4x75mm x 1 5x85mm x 1 6x93mm x 2 7x100mm x 1 8x110mm x 1 10x120mm x 1 Wrench x 1 Package Includes: 1 Set of Countersink Drill Bits.1 Set of Countersink Drill Bits. Great for woodworking. 4 Pcs Set Three tapered points design, sharp, easy to use, efficient. 7 Pcs Set Made of premium high speed steel, solid, high quality, durable.