Sometimes placements are tricky. Different crags throw up shallow cracks, off-width cracks, old peg scars, all of which are hard to protect with conventional nuts.
Peenuts offer an excellent alternative, they have a tapered profile allowing them to fit where a regular wire won't seat.

Size 1 Strength: 4KN Weight: 9.4g

Size 2 Strength: 5KN Weight: 9.7g

Size 3 Strength: 5KN Weight: 10.1g

Size 4 Strength: 8KN Weight: 16g

Size 5 Strength: 8KN Weight: 18g