Axle Deadlift

Trains the Spinal Erectors.

How to do it

Set a loaded axle — a thick bar with no revolving sleeves — over the middle of your feet.
Take a double overhand grip; an axle is usually too thick for a comfortable mixed or hook grip.
Set your back flat, chest up, hips lower than you might use on a bar.
Push the floor away and stand up, keeping the axle against your legs.
Finish tall without leaning back.
Lower under control along the same path.

Expecting your barbell deadlift number. The thick handle is the limit for almost everyone — the grip fails long before the back does, which is what the implement is for.
Using straps and calling it an axle deadlift. Straps remove the only thing that makes it different; both are valid, but they are not the same exercise.
Letting the axle roll in the hands. It does not spin, so a bar rotating means your grip is rotating, and that is where it gets dropped.
Rounding the back as the grip goes. When the hands start opening, the set ends — pulling harder with a failing grip is how the bar gets lowered badly.