Stoppers are another classic BD design, which despite having undergone the odd slight tweak/facelift hear and there, remain relatively unchanged which shows how well designed they were!
Sizes 1, 2 and 3 are smaller than a SIzes 1, 2 and 3 Rocks/Wallnuts, they are in fact very similar in shape to DMM Micro Wallnuts.
| Size | Weight (g) | Colour | Strength (KN) |
| 1* | 7 | Red | 2 |
| 2* | 8 | Yellow | 2 |
| 3 | 15 | Blue | 5 |
| 4 | 16 | Grey | 6 |
| 5 | 18 | Purple | 6 |
| 6 | 32 | Green | 10 |
| 7 | 34 | Red | 10 |
| 8 | 37 | Yellow | 10 |
| 9 | 39 | Blue | 10 |
| 10 | 43 | Grey | 10 |
| 11 | 51 | Purple | 10 |
| 12 | 58 | Green | 10 |
| 13 | 71 | Red | 10 |
**Black Diamond state that sizes 1 and 2 be used for direct aid placements only.
