What spike is this? Identifying some utensils

I have a definitive answer. I found a manual to the combination microwave oven, which is a Samsung C108STBC or similar.

The accessories to this oven (which can grill and/or microwave) include:

• a roasting spit (also referred to as "roasting stand") which is the larger spike.

  The roasting spit is a convenient way of barbecuing a chicken, as the meat does not have to be turned over. It can be used for grill combination cooking.

• the skewers that fit into a plastic "coupler" that I found in another cupboard drawer (it looks a little like a cotton reel and I would have never picked it as something to be put in an oven). Together, the skewers are mounted vertically in a circle to form a "multi-spit".

  Using the multi-spit with 6 kebab skewers you can easily barbecue meat, poultry, fish, vegetables (like onions, peppers or courgettes) and fruit which have been cut into pieces.

The spike stand in the background looks like a ticket puncher that you'd see in a cafe. As in, after you pay your ticket, the staff member pokes it through the spike to collect them all.

They Z shapes look like roasting spikes (or skewers)

Used for odd shaped birds and meat cuts to make suitable for even roasting, especially on a spit-roast (rotating roast machine)

The Z shapes spikes are used to hold out a flap, or to hold two parts together. The bend is used to lock it in place against another part of the meat, or against another spike

The spike with the stand is most likely a receipt spike, though I have seen similar things used to hold roasts up of the tray to stop "soggy bottoms", and to let the fat drain off

My mother used small skewers in baking potatoes, although not shaped like yours. (The metal supposedly conducted heat into the potatao centers to speed baking. I was and remain skeptical of the efficacy of this) I agree that the single unit looks like an order spike.

This looks like a divider stands for your bowls inside the drawers.