| HalfRound 
                              Copper-Coated Carbon Electrldew(D.C.) | 
                          
                            | Excellent for request groove broad but shallow etc special site. | 
                           
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                                |                                   Model | Dia×Length | CurrentRanger(A) |  
                                | mm | inches |  
                                | B508B | 8×4×355 | 5/16×5/32×14' | 200-250 |  
                                | B510B | 10×5×355 | 3/8×3/16×14' | 250-350 |  
                                | B513B | 13×6.5×355 | 1/2×1/4×14' | 400-450 |  
                                | B516B | 16×8×355(510) | 5/8×5/16×14'(20') | 550-600 |  | 
                           
                            | HalfRound Copper-Coated Carbon Electrldew(D.C.) |