slider bolts there called,never tried them tho.
Lower offset means they stick out further.
average car is et35
Put et15 on a et35 car and they will stickout 20mm
et49(vaux)on a et35 car,they'll be in by 14mm and could foul/catch the struts.
In Europe they run et0 on polo's, so the rims stick out 35mm for the phat look.
Your car is pcd(bolt pattern) 4x98, these are 4x100,so your bolts are 1mm closer together.,I usually file a bit off the bolt hole or drill the bolt hole too M13 (13mm) from 12mm.
If you wanna take one and have a fiddle,please do as ya welcome and drop it back off at the cruise or later to my house.