| Keyword | CPC | PCC | Volume | Score |
|---|---|---|---|---|
| pencil lead hardness chart and darkness | 1.79 | 0.2 | 5315 | 83 |
| mechanical pencil lead hardness chart | 0.7 | 0.4 | 9770 | 88 |
| pencil test for lead hardness chart | 0.41 | 0.7 | 3863 | 48 |
| pencil lead hardness ratings | 0.62 | 0.3 | 9320 | 66 |
| difference in pencil lead hardness | 0.4 | 0.1 | 4806 | 27 |
| pencil lead hardness scale | 1.04 | 0.3 | 4448 | 59 |
| types of pencil lead hardness | 1.78 | 0.1 | 7572 | 24 |
| hardness of lead pencils | 1.47 | 0.7 | 4172 | 86 |
| pencil hardness versus lead alloy hardness | 0.31 | 0.3 | 5368 | 59 |
| lead pencil hardness grades | 0.94 | 0.7 | 4410 | 61 |
| pencil lead bhn hardness chart | 1.87 | 0.1 | 4035 | 4 |
| mechanical pencil lead sizes and hardness | 0.1 | 0.9 | 1705 | 76 |
| mechanical pencil lead hardness | 0.63 | 0.4 | 3729 | 72 |
| lead hardness scale for pencils | 1.33 | 0.8 | 9824 | 95 |
| pencil lead softness chart | 0.25 | 0.1 | 5984 | 94 |
| mechanical pencil lead hardness rating | 0.86 | 0.9 | 3156 | 62 |
| best pencil lead hardness for writing | 1.7 | 0.3 | 4952 | 13 |
| lead hardness testing pencils | 0.35 | 0.5 | 1121 | 24 |
