Halfnuts

Some routes have fiddly gear, especially limestone and culm. If you're climbing in these places then half wires are ideal. Perfect for small keyhole type placements and pin scars. The single wire makes fiddling them in to placements at an angle (rather than straight down) much easier than a standard wall nut.

They're also lighter than a full set of nuts and so if I'm not sure about the weight on a long or alpine route then I find I take these rather than doubling up on wall nuts. They are pretty much a permanent feature on my harness now.

I love these, I use them for all the duplicates on my rack. Not only are they light, but they are incredibly versatile in their placement, having an flared profile when placed sideways.

Because of the design of these not only do they save weight compared to the regular wallnuts, but they also can be placed in shallower cracks.

Half nuts have been a great addition to my rack. I don’t use them as often as my offsets but they are great to double up on nuts for multi pitch routes and work really well on the slate.

I got the full set of these and they are by far the most useful bits of passive pro I own. Since they have the two orientations they fit into just about any placement between the set; the small ones in particular fit really well into rubbish tiny placements and really shallow placements. Even with the single cable they are still stiff enough to easily place and fiddle around with one hand too.
Definitely a favourite.