The HLLA latches are robust and adjustable thanks to the adjustable traction hook. There are now 4 new stainless-steel references:

• HLLAHSX51S
• HLLAHSX65S
• HSHS51S
• HSHS65S

What is the difference between the standard part number HLLAX51S and the new part number HLLAHSX51S?
Between the 2 references, there are the 2 letters H and S which mean High strenght.
Indeed, the maximum tensile force is 6800N for HLLAHSX51S against 4600N for HLLAX51S.
Also, the draw hook is longer with a little different design because it can be used only with its HSHS51S strike.

Below is the technical drawing: