| Keyword | CPC | PCC | Volume | Score |
|---|---|---|---|---|
| pencil lead bhn hardness chart | 1.01 | 0.6 | 5814 | 55 |
| pencil lead hardness chart | 0.14 | 0.5 | 8525 | 18 |
| mechanical pencil lead hardness chart | 0.49 | 0.5 | 9090 | 55 |
| pencil lead hardness chart and darkness | 1.98 | 0.7 | 2337 | 87 |
| pencil lead hardness guide | 0.97 | 0.7 | 3847 | 15 |
| pencil test for lead hardness chart | 1.9 | 0.7 | 5585 | 43 |
| hb pencil lead hardness scale | 0.53 | 0.4 | 1579 | 97 |
| pentel pencil lead hardness chart | 0.11 | 0.6 | 5049 | 42 |
| hardness of pencil lead | 1.37 | 0.1 | 5906 | 50 |
| pencil lead hardness ratings | 0.76 | 0.5 | 2554 | 71 |
| pencil lead hardness scale | 0.91 | 0.8 | 8860 | 25 |
| lead pencil hardness grades | 0.07 | 0.3 | 848 | 61 |
| types of pencil lead hardness | 1.62 | 0.3 | 6465 | 24 |
| mechanical pencil lead hardness rating | 0.37 | 0.6 | 4427 | 46 |
| pencil hardness versus lead alloy hardness | 0.28 | 0.5 | 9226 | 19 |
| mechanical pencil lead hardness | 0.55 | 0.7 | 1331 | 96 |
| hardness of lead pencils | 0.04 | 1 | 4865 | 50 |
| mechanical pencil lead hardness scale | 0.69 | 0.8 | 3540 | 91 |
| mechanical pencil lead sizes and hardness | 1.52 | 0.1 | 2443 | 31 |
| difference in pencil lead hardness | 1.62 | 0.3 | 8205 | 36 |
| lead hardness scale for pencils | 0.22 | 0.9 | 8788 | 33 |
