This is the master link that most others were built around. It is, by all means, considered the industry-standard. Now, the Crosby A-342 is even better. Made from alloy steel, the most popular sizes have been enlarged with generous interior dimensions that make them easier to fit with multiple-leg bridles and large crane hooks (models with a "W"). Sizes 1/2" - 2-1/2" are now made from Grade 100 alloy steel and are Platinum in color (except for 5/8"). Also, sizes up to 4" are forged and weldless (sizes 4-1/4" - 5" are welded). They are equipped with a safety factor of 5:1. Raised letter markings include the following: Size, Crosby, USA, QUIC-CHECK (deformation and angle indicators), and Product Identification Codes (PIC's).