Need some guidance here mates, I have a CRKT shenanigans flooding knives, and it's my utility knives that I use for construction work, so it gets abused a bit, but I have noticed that the blade its getting dull, so my question is that should I buy some sharpening stones or will a badly sharpener (
https://www.amazon.com/gp/aw/d/B000O8OTNC/ref=pd_aw_fbt_469_img_2?ie=UTF8&psc=1&refRID=NHRW0HY2EB7K8DWF9Y53) will do just fine?