The best selling Glaser Wheel Hoe is this model the Berg 00, it has multiple and adjustable attachment fixing points and is supplied with a simple 'offset extension set", which allows the handles to be angled to either side to avoid walking on the cultivated soil surface.
When equipped with a pair of centre-mounted 175mm Stirrup Hoe (as show in pic, but not included), it gives you the ability to hoe and cultivate a width between 175mm and 350mm, or wider with a gap centre.
The basic option has no blades at all, select the double stirrup hoe option for 2 centre mounted hoes included, or you can select your own attachments.