Bought this for my 335 semi hollow and just by adding a small foam (picture 2) to the bottom (seated into the aft strap knob) it now fits tight at the top shoulders ( using the provided upholstered fitting strips) and does not shift fore/ aft or side to side at all. Plenty of neck/head stock room so no worries there and good (but not too much) downforce when the case is shut. Handle is solid and I have not dropped it (yet). Clasps are solid metal (anodized aluminum I would guess) and it has one on the backside so 4 in total, other hardware ( anti scuff buttons on bottom and back) are also metal and seems fine. Overall, I would recommend this for your 335,345,355 semi style. Fit for a full hollow body with a large bigsby and big vibrato, or a big trapeze might be another story I don’t know…