I dunno what it is, but it WAS a bargain Can anyone shed some light? The 3 bars have taper sections at one end; small end simply continues as a straight rod. The crank is cast Aluminium, and features a hole angled about 60 deg to the arm that connects it to the large shaft. This hole is the only one that fits one of the pieces in the kit; the small angled bar (front, centre), which features a narrow steel blade as the shorter of the two arms. As can be seen, the bend in this is about 100 Deg.The “slot” apparent in the upper rhs part is intentional, and not the result of some mishap. It may be a security feature to prevent an attachment escaping dangerously if spun in the lathe by the longer (turned) section. I could go on, but those who know will already have identified it, and the rest of us probably won’t happen on the answer, so I’ll post as is. Thanks anyone who can save me when the wife asks the inevitable question

That’s what I was hoping.

The two shorter straight bars appear to have about half a morse-taper on the end; a size 1MT and size 2 MT. The exposed end is slightly domed, and has a small hole like a mini centre-drill hole. Between the two, I wonder if it allows the headstock and tailstock to be both “plugged” leaving the centre holes in each? That doesn’t explain why the long part that would then be inside the head and tailstocks is necessary.