| Keyword | CPC | PCC | Volume | Score |
|---|---|---|---|---|
| lead hardness scale for pencils | 1.94 | 0.1 | 34 | 69 |
| drafting pencil lead hardness scale | 1.05 | 0.8 | 7719 | 45 |
| hardness of lead pencils | 1.37 | 0.2 | 6091 | 94 |
| hb pencil lead hardness scale | 1.11 | 0.9 | 6803 | 6 |
| pencil lead hardness chart | 0.2 | 0.1 | 6066 | 57 |
| lead pencil hardness grades | 1.82 | 0.1 | 3639 | 49 |
| hardness of pencil lead | 1.48 | 0.2 | 3059 | 88 |
| pencil lead hardness guide | 0.02 | 1 | 6433 | 24 |
| pencil test for lead hardness chart | 1.41 | 0.8 | 5253 | 46 |
| lead hardness testing pencils | 0.35 | 0.3 | 3324 | 30 |
| pencil lead hardness ratings | 1.82 | 0.5 | 5262 | 37 |
| mechanical pencil lead hardness chart | 1.92 | 0.3 | 2854 | 29 |
| pentel pencil lead hardness scale | 1.32 | 0.1 | 3401 | 18 |
| pencil lead hardness chart and darkness | 0.1 | 0.9 | 1062 | 58 |
| mechanical pencil lead hardness rating | 1.13 | 0.7 | 2649 | 17 |
| mechanical pencil lead sizes and hardness | 1.75 | 0.4 | 8743 | 19 |
| mechanical pencil lead hardness | 0.81 | 0.7 | 3572 | 17 |
| pencil lead softness scale | 1.27 | 0.7 | 4859 | 46 |
| types of pencil lead hardness | 1.05 | 0.8 | 4723 | 100 |
