California Proposition 65: This product contains a chemical known to the State of California to cause birth defects or other reproductive harm. Square End Mill, 0.375 in Milling Dia., High Speed Steel, Uncoated, Weldon Flat, Length of Cut 2.5 in, Overall Length 4 1/4 in, Shank Dia. 3/8 in, Neck Dia. Not Applicable