The reversible tapping attachment from tools & appliances corporation are applicable to be used in every vertical drilling machine with a rotating non - reversing spindles. Model tcn can be applied in every machine shop and it dispenses with labourious hand tapping and use of expensive machines. These reversible tapping attachment can give an accurate batch quantities or mass production with a speciality of right or left hand tapping modification. The reversible tapping attachments comes with an adjustable friction clutch which ensures that there is no tap breakage and an automatic reverse mechanism and rapid backout with inbuilt planetary gear drive.