Brazing formula optimizes drilling. Unique flute geometry provides efficient dust removal. Centering point provides accurate and precise round holes. For drilling into brick, block, and concrete. No. 48-20-4037: Diameter: 3/8 In., Length: 10 In., Flute Length: 5 In., Cutter Geometry: 2-Cutter, Material: Carbide, Pkg Qty: 1, Package Type: Tube No. 48-20-4050: Diameter: 1/2 In., Length: 11 In., Flute Length: 6 In., Cutter Geometry: 2-Cutter, Material: Carbide, Pkg Qty: 1, Package Type: Tube No. 48-20-4051: Diameter: 1/2 In., Length: 16 In., Flute Length: 11 In., Cutter Geometry: 2-Cutter, Material: Carbide, Pkg Qty: 1, Package Type: Hang Tag No. 48-20-4054: Diameter: 1/2 In., Length: 36 In., Flute Length: 31 In., Cutter Geometry: 2-Cutter, Material: Carbide, Pkg Qty: 1, Package Type: Clamshell No. 48-20-4063: Diameter: 5/8 In., Length: 16 In., Flute Length: 11 In., Cutter Geometry: 2-Cutter, Material: Carbide, Pkg Qty: 1, Package Type: Hang Tag No. 48-20-4064: Diameter: 5/8 In., Length: 22 In., Flute Length: 17 In., Cutter Geometry: 2-Cutter, Material: Carbide, Pkg Qty: 1, Package Type: Hang Tag No. 48-20-4076: Diameter: 3/4 In., Length: 16 In., Flute Length: 11 In., Cutter Geometry: 2-Cutter, Material: Carbide, Pkg Qty: 1, Package Type: Hang Tag No. 48-20-4078: Diameter: 3/4 In., Length: 22 In., Flute Length: 17 In., Cutter Geometry: 2-Cutter, Material: Carbide, Pkg Qty: 1, Package Type: Hang Tag No. 48-20-4087: Diameter: 7/8 In., Length: 16 In., Flute Length: 11 In., Cutter Geometry: 2-Cutter, Material: Carbide, Pkg Qty: 1, Package Type: Hang Tag No. 48-20-4100: Diameter: 1 In., Length: 16 In., Flute Length: 11 In., Cutter Geometry: 2-Cutter, Material: Carbide, Pkg Qty: 1, Package Type: Hang Tag No. 48-20-4101: Diameter: 1 In., Length: 22 In., Flute Length: 17 In., Cutter Geometry: 2-Cutter, Material: Carbide, Pkg Qty: 1, Package Type: Clamshell No. 48-20-4113: Diameter: 1-1/8 In., Length: 22 In., Flute Length: 17 In., Cutter Geometry: 2-Cutter, Material: Carbide, Pkg Qty: 1, Package Type: Hang Tag No. 48-20-4125: Diameter: 1-1/4 In., Length: 16 In., Flute Length: 11 In., Cutter Geometry: 2-Cutter, Material: Carbide, Pkg Qty: 1, Package Type: Tube No. 48-20-4126: Diameter: 1-1/4 In., Length: 22 In., Flute Length: 17 In., Cutter Geometry: 2-Cutter, Material: Carbide, Pkg Qty: 1, Package Type: Hang Tag No. 48-20-4151: Diameter: 1-1/2 In., Length: 22 In., Flute Length: 17 In., Cutter Geometry: 2-Cutter, Material: Carbide, Pkg Qty: 1, Package Type: Hang Tag