This is a genuine Shimano quick release.
Efficient tightening allows for a secure lock. The tightness is light and smooth so your hands wont be hurt.
Main Specifications:
Weight: Front approx. 2.9 oz (82 g).
Shaft diameter: Φ0.2 in (5.0 mm)
Compatible end width: F100
Shaft Length: Front: Approx. 5.3 inches (133 mm).
No manual or package.