Which of the following pallets does NOT allow for entry from all four sides?

The 2-way entry pallet is designed to allow entry from only two sides. This design usually features stringers that run along the length of the pallet, meaning that accessing it from the sides not aligned with the stringers is not possible. In contrast, the 4-way entry pallet permits access from all four sides, providing greater flexibility in handling and maneuvering. A double-wing pallet has extended wings that facilitate access from multiple angles, and a stringer pallet, particularly in its 4-way variant, is designed to allow entry from either end as well as the sides. Thus, the distinguishing feature of the 2-way entry pallet is that it restricts entry to only two sides, differentiating it from the others listed in the question.