This is a Pitbull motorcycle lift. I know that it fits a fifth generation Honda VFR. The bar slides into the hollow rear axle and lifts the bike up so you can work on it. See the pictures. It might fit other motorcycles I don't know. Very solid very dependable. Dimensions of the stub that fit into the axle are 6 cm long by just under 29 mm in diameter.
From the pitbull website: looks like it will fit the following-
Hybrid One Armed Rear, CB1000R(up to '17), Hawk, & VFR800 retail $189
do NOT contact me with unsolicited services or offers