Parlec Cat 40 Tension Compression Tapping Holder C40-20TA4 Appears To Be New. Shows no sign of wear that I can see! Includes the holder and the retention knob that is in holder as well as 12 Bilz #2 adapter. Sizes are as followed: 3/16, 1/4, 5/16, marked as U 1/2 measures .367, 7/16 measyres .33, 3/8", 5/8 measures .49, b220-068p measures .54, 1/4 pipe, measures .,606, 1/2 pipe, and co-78942 measures .700. Feel free to check out my other items for sale!!