| Keyword | CPC | PCC | Volume | Score |
|---|---|---|---|---|
| chart of pencil lead hardness | 1.65 | 0.8 | 7548 | 51 |
| mechanical pencil lead hardness chart | 0.63 | 0.5 | 5051 | 93 |
| pentel pencil lead hardness chart | 0.57 | 0.3 | 8720 | 57 |
| pencil lead hardness chart and darkness | 1.52 | 0.1 | 2347 | 58 |
| pencil test for lead hardness chart | 0.88 | 0.5 | 9587 | 67 |
| staedtler pencil lead hardness chart | 0.86 | 0.9 | 2569 | 92 |
| mechanical pencil lead thickness chart | 0.18 | 1 | 5932 | 47 |
| lead pencil hardness grades | 0.31 | 0.9 | 4468 | 23 |
| pencil lead hardness scale | 1.5 | 0.8 | 3792 | 39 |
| types of pencil lead hardness | 1.04 | 1 | 6998 | 98 |
| pencil lead hardness ratings | 1.43 | 0.1 | 9944 | 1 |
| pencil hardness versus lead alloy hardness | 0.92 | 0.7 | 6933 | 64 |
| difference in pencil lead hardness | 1.55 | 0.6 | 7209 | 38 |
| hardness of lead pencils | 1.4 | 1 | 4703 | 41 |
| lead hardness scale for pencils | 0.48 | 0.5 | 128 | 61 |
| mechanical pencil lead thickness | 1.88 | 0.1 | 7752 | 96 |
| hard mechanical pencil lead | 0.21 | 0.4 | 72 | 20 |
