MIC100 ITL-2901250X Left Hand - 0.3120" (5/16) Min Bore DIA x 1.250" (1-1/4) Max Bore Depth x 0.0810" Tooth Width x 0.0700" Projection x 2.50" (2-1/2) OAL x 0.0020" Radius #8-40 - AlTiN Coated