1-5/8 in
Safety Technology International Kit-H19030 Key, For Stopper Ii Series, 1-5/8"
You will find that the silver surface is non-slip even when slightly greasy.
Safety Technology International Key,For Stopper II Series,1-5/8" Sz,PK2
What stands out about the silver finish is its ability to hide smudges from oily hands.
Browning Split Taper Bushing H 20 MM, Made in Mexico
This product's 6 inch dimension helps it stay put on a workbench without sliding around.