Figure 1. Crane hook made with a latch: a simple (left), a double (right) [3]

From

Full-field Stress Analysis of a Crane Hook Model Performed by Finite Element Analysis and Digital Image Correlation Method

Martin Hagara, Miroslav Pástor

American Journal of Mechanical Engineering. 2017, 5(6), 293-297 doi:10.12691/ajme-5-6-12