Choosing a rock & surf rod
Read the sinker rating first. A rock and surf rod is bought for the lead it throws: 2-3 oz covers edible fishing, 4-6 oz is shark-and-ray territory. The PE/pound class beside it tells you the trace and drag the blank expects.
The # number is a local scale. #3, #4 and #5 are South African power classes, heavier as they rise. They do not translate to US Medium/Heavy - a #5 is a serious shark rod.
Butt length is a casting choice. Long Butt suits the full pendulum-style swing off the beach; Short Butt suits rock work and shorter anglers. Same blank family, different model.
Spin or multiplier is a genuine fork. Most families come in both; the multiplier versions carry lower guide counts and the spin versions bigger strippers. Pick by the reel you cast, not by the rod name.