TA-1 Series thumb hole tapes: TA-1C is a thin teflon tape with a very slippery property designed to eliminate sticking problems. TA-1D is made of a thick plastic foam urethane designed to adjust the thumb hole size Apply TA-1 series tapes in the thumb hole on the nail side of the thumb hole. Apply the TA-1 series Tapes inside the thumb hole on the nail side of the thumb hole TA-1C is a thin Teflon tape with a very slippery property designed to eliminate sticking spots.