Drill Rod Bush Bushing Tool Set Sleeve Imperial 3/16 - 3/4" Imperial Sizes.
Boxed.
Each bushing has a tapered entry and comes in two parts.
Outside diameter is about 1 1/2" (Excluding flange)
Let me know if you need any other measurements or have questions.

3/16"
5/16"
3/8"
1/4"
1/2"
7/16"
3/4"