HSS tool bits, Square type
    Norm: GB4211, ISO5421
    Material: HSS, HSS-Co

    Metric Sizes Inch Sizes
    a x L   a x L Sizes   Sizes
    3 x 63 mm 10 x 150 mm 1/8" x 2-1/2" 1/4" x 6"
    4 x 63 12 x 150 3/16" x 2-1/2" 5/16" x 6"
    5 x 63 14 x 150 1/4" x 2-1/2" 3/8" x 6"
    6 x 63 16 x 150 5/16" x 2-1/2" 1/2" x 6"
    8 x 63 18 x 150 7/16 x" 2-1/2" 5/8" x 6"
    4 x 80 20 x 150 5/16" x 3" 3/4" x 6"
    5 x 80 22 x 150 3/8" x 3" 7/8" x 6"
    6 x 80 25 x 150 1/2" x 3" 1" x 6"
    8 x 80 6 x 200 7/16” x 3-1/2” 1"  x 7"
    10 x 80 8 x 200 1/8" x 4" 3/16" x 8"
    12 x 80 10 x 200 3/16" x 4" 1/4" x 8"
    5 x 100 12 x 200 1/4" x 4" 5/16" x 8"
    6 x 100 14 x 200 5/16" x 4" 3/8" x 8"
    8 x 100 16 x 200 3/8" x 4" 1/2" x 8"
    10 x 100 18 x 200 1/2" x 4" 5/8" x 8"
    12 x 100 20 x 200 5/8" x 4" 3/4" x 8"
    14 x 100 22 x 200 3/4" x 4" 7/8" x 8"
    16 x 100 25 x 200 1" x 4" 1" x 8"
    20 x 100 32 x 200 5/8" x 4-1/2" 1-1/4" x8"
    6 x 150 38 x 200 3/4"  x5" 1-1/2" x8"
    8 x 150 50 x 200 3/16" x 6" 2" x8"

    HSS tool bits, Rectangular type
    Norm: GB4211, ISO5421
    Material: HSS, HSS-Co

    Metric Sizes Inch Sizes
    b x h x L   b x h x L b x h x L   b x h x L
    3x12 x100 mm 6x16 x150 mm 3/32x1/2 x4-1/2" 1/4x1/2 x6"
    3x16 x100 6x20 x150 1/8x1/2 x3-1/2" 1/4x1/2 x8"
    4x6 x100 6x25 x150 1/8x1/2 x4" 1/4x5/8 x5"
    4x8 x100 8x12 x150 1/8x1/2 x4-1/2" 1/4x5/8 x8"
    4x16 x100 8x16 x150 1/8x1/2 x8" 1/4x3/4 x5"
    4x20 x100 8x20 x150 1/8x1/2   1/4x3/4 x8"
    5x8 x100 10x16 x150 1/8x5/8 x4" 1/4x1 x6"
    5x10 x100 10x20 x150 1/8x5/8 x6" 1/4x1 x8"
    5x20 x100 10x25 x150 1/8x5/8 x8" 1/4x1 x12"
    5x25 x100 12x20 x150 1/8x3/4 x4" 1/4x1-1/4 x12"
    6x10 x100 12x25 x150 1/8x3/4 x6" 1/4x1-1/2 x12"
    6x12 x100 3x12 x200 1/8x3/4 x8" 3/8x1/2 x4"
    6x16 x100 3x16 x200 1/8x1 x4" 3/8x1/2 x8"
    6x20 x100 4x6 x200 1/8x1 x6" 3/8x5/8 x6"
    6x25 x100 4x8 x200 1/8x1 x8" 3/8x5/8 x8"
    8x12 x100 4x16 x200 1/8x1 x12" 3/8x3/4 x6"
    8x16 x100 4x20 x200 3/16x1/2 x4-1/2" 3/8x3/4 x8"
    8x20 x100 5x8 x200 3/16x1/2 x6" 3/8x1 x6"
    10x16 x100 5x10 x200 3/16x1/2 x8" 3/8x1 x8"
    10x20 x100 5x20 x200 3/16x5/8 x4" 3/8x1-1/4 x12"
    10x25 x100 5x25 x200 3/16x5/8 x5" 3/8x1-1/2 x12"
    12x20 x100 6x10 x200 3/16x5/8 x8" 3/8x2 x12"
    12x25 x100 6x12 x200 3/16x3/4 x4" 1/2x5/8 x6"
    3x12 x150  6x16 x200 3/16x3/4 x4-1/2" 1/2x5/8 x8"
    3x16 x150 6x20 x200 3/16x3/4 x8" 1/2x3/4 x6"
    4x6 x150 6x25 x200 3/16x1 x4" 1/2x3/4 x8"
    4x8 x150 8x12 x200 3/16x1 x6" 1/2x1 x6"
    4x16 x150 8x16 x200 3/16x1 x8" 1/2x1 x8"
    4x20 x150 8x20 x200 3/16x1 x12" 1/2x1 x8"
    5x8 x150 10x16 x200 1/4x3/8 x3" 1/2x1 x12"
    5x10 x150 10x20 x200 1/4x3/8 x4" 1/2x1-1/4 x12"
    5x20 x150 10x25 x200 1/4x3/8 x6" 1/2x1-1/2 x12"
    5x25 x150 12x20 x200 1/4x3/8 x8" 1/2x2 x12"
    6x10 x150 12x25 x200 1/4x1/2 x4" 1"x2" x12"
    6x12 x150     1/4x1/2 x4-1/2"

    HSS tool bits, Round type
    Norm: GB4211, ISO5421
    Material: HSS, HSS-Co

    Metric Sizes Inch Sizes
    d x L   d x L d x L   d x L
     1 x 100 mm 8 x 150 mm 1/16" x 4" 3/8" x 6"
    1.5 x 100 10 x 150 3/32" x 4" 1/2" x 6"
    2 x 100 12 x 150 1/8" x 4" 5/8" x 6"
    2.5 x 100 14 x 150 3/16" x 4" 3/4" x 6"
    3 x 100 16 x 150 1/4" x 4" 7/8" x 6"
    4 x 100 18 x 160 5/16" x 4" 1" x 6"
    5 x 100 20 x 160 3/8" x 4" 1/8" x 8"
    6 x 100 25 x 160 1/2" x 4" 3/16" x 8"
    7 x 100 6 x 200 5/8" x 4" 1/4" x 8"
    8 x 100 8 x 200 3/4" x 4" 5/16" x 8"
    10 x 100 10 x 200 7/8" x 4" 3/8" x 8"
    12 x 100 12 x 200 1" x 4" 1/2" x 8"
    14 x 100 14 x 200 1/8" x 6" 5/8" x 8"
    16 x 100 16 x 200 3/16" x 6" 3/4" x 8"
    20 x 100 20 x 200 1/4" x 6" 7/8" x 8"
    25 x 100 25 x 200 5/16" x 6" 1" x 8"