| ขนาด | เทียบนิ้ว | Conduit |
| 13 mm | 1/2" | |
| 16 mm | 5/8" | |
| 19 mm | 3/4" | |
| 21 mm | 13/16" | |
| 22 mm | 7/8" | 1/2" |
| 25 mm | 1" | |
| 26 mm | 1-1/32" | |
| 27 mm | 1-1/16" | |
| 28 mm | 1-1/8" | 3/4" |
| 30 mm | 1-3/16" | |
| 32 mm | 1-1/4" | |
| 33 mm | 1-5/16" | |
| 35 mm | 1-3/8" | 1" |
| 38 mm | 1-1/2" | |
| 41 mm | 1-5/8" | |
| 43 mm | 1-11/16" | 1-1/4" |
| 45 mm | 1-3/4" | 1-1/4" |
| 48 mm | 1-7/8" | |
| 51 mm | 2" | 1-1/2" |
| 54 mm | 2-1/8" | |
| 58 mm | 2-1/4" | |
| 60 mm | 2-3/8" | 2" |
| 64 mm | 2-1/2" | |
| 67 mm | 2-5/8" | |
| 70 mm | 2-3/4" | |
| 73 mm | 2-7/8" | 2-1/2" |
| 76 mm | 3" | |
| 89 mm | 3-1/2" | 3" |
| 102 mm | 4-1/16" | 3-1/2" |
| 115.5 mm | 4-9/16" | 4" |
น็อคเอาท์เจาะเหล็ก , น็อคเอาท์เจาะเหล็กแผ่น , น็อคเอาท์เจาะตู้เหล็ก , น็อคเอ้าท์เจาะรู , น็อคเอาท์ เจาะรู


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