This is a Harbor Freight wheel chock, it works!
You roll the bike onto it and the swing-up back clamp
catches the back of the tire holding the Harley safely upright.
Negative about it is it bolts to the floor and is in the way.
Nikon D3 1/60s f/5.0 at 24.0mm iso200
24/70 f2.8 AF-S, SB 900
full exif