TSD Universal ACURA Positive Drive Tap Chuck and Collets. Collets and driver are in good condition. Driver shank is 1” diameter. Collets include: 7/16, 1/2, 9/16, 5/8, 3/4, 7/8, 1/8 pipe (x3), 1/4 pipe (x2), 3/8 pipe. What you see is what you get. Please feel free to check out my other machinist/ tool related items, thank you.