Good part of the shackle

For a basic equipment felling a tree, a shackle is such imperative've bought several of them, for round slings and pulleys.
Of course, the strong parts, but also need to vigorously maintain what!
The use is no problem, the twist-pen can be easily inserting and removing.

Conclusion:
Real Good part without problems in everyday use. 5 Stars.

PS Even my shackles had a blue pen (no red), but did not really have to function a negative impact ;-).