| Keyword | CPC | PCC | Volume | Score |
|---|---|---|---|---|
| hb pencil lead hardness scale | 1.02 | 0.4 | 1945 | 82 |
| pencil lead hardness scale | 1.73 | 0.9 | 1055 | 40 |
| mechanical pencil lead hardness scale | 0.03 | 1 | 4444 | 68 |
| lead hardness scale for pencils | 1.24 | 0.9 | 4916 | 55 |
| pencil lead bhn hardness chart | 0.18 | 1 | 1763 | 55 |
| pencil lead hardness ratings | 1.27 | 0.8 | 6022 | 79 |
| pentel pencil lead hardness scale | 0.13 | 0.9 | 3943 | 71 |
| drafting pencil lead hardness scale | 0.41 | 0.9 | 9424 | 51 |
| pencil lead hardness chart | 0.54 | 0.4 | 1361 | 100 |
| mechanical pencil lead hardness rating | 0.33 | 0.3 | 361 | 25 |
| mechanical pencil lead hardness chart | 0.07 | 0.6 | 8889 | 87 |
| lead pencil hardness grades | 0.95 | 1 | 5275 | 78 |
| hardness of pencil lead | 1.91 | 0.5 | 4380 | 76 |
| pencil lead hardness guide | 0.41 | 0.8 | 6082 | 60 |
| mechanical pencil lead hardness | 1.59 | 0.2 | 6046 | 6 |
| hardness of lead pencils | 1.44 | 0.9 | 6839 | 70 |
| pencil lead hardness chart and darkness | 1.33 | 0.8 | 5216 | 7 |
| pencil test for lead hardness chart | 1.3 | 0.1 | 6947 | 23 |
| mechanical pencil lead sizes and hardness | 1.43 | 0.8 | 3542 | 42 |
| hardness scale for pencils | 0.56 | 0.7 | 4023 | 38 |
| lead hardness testing pencils | 0.26 | 0.9 | 6012 | 36 |
