i wouldnt use those. but that's just me. i dont feel safe w/ a converter. im sure it is but...i recall someone's breaking due to either not checking or poor quality
just get the real 5 lug conversion and be done. if you only have 2 wheels you like go w/ the dope 20 lug (4 lug front 5 lug rear or vise versa) conversion
best of both worlds