Buy this knife! I own probably 20 oyster knives, and have 2 or 3 of these plus several similar to them. A must have in order to shuck Kumamotos, the smaller Pacific (gigas) and even the smaller virginica oysters. Roughing up the plastic handle with a rasp or file helps to keep a grip when the oyster shells start flying.
The only way to go. We prefer that our cooks buy these. Cheap and reliable, and fast.