The geometry of these tools increases the amount of effective cutting flutes resulting in superior performance over a standard burr.
      
      
        
        
        Part Number:
        67-505
        
                        
            Cutting Diameter (mm):
            3.175
        
                                
            Length of Cut (mm):
            12.7
        
                                
            Shank Diameter (mm):
            3.175
        
                                
            Overall Length (mm):
            50.8
        
                        
        Stock Level:
        Bronze
        
        
        £132.29
        
        
        
     
    
        
        Part Number:
        67-508
        
                        
            Cutting Diameter (mm):
            4.76
        
                                
            Length of Cut (mm):
            15.88
        
                                
            Shank Diameter (mm):
            4.76
        
                                
            Overall Length (mm):
            50.8
        
                        
        Stock Level:
        Bronze
        
        
        £134.36
        
        
        
     
    
        
        Part Number:
        67-511
        
                        
            Cutting Diameter (mm):
            6.35
        
                                
            Length of Cut (mm):
            19.05
        
                                
            Shank Diameter (mm):
            6.35
        
                                
            Overall Length (mm):
            76.2
        
                        
        Stock Level:
        Bronze
        
        
        £137.87
        
        
        
     
    
        
        Part Number:
        67-511M
        
                        
            Cutting Diameter (mm):
            6
        
                                
            Length of Cut (mm):
            20
        
                                
            Shank Diameter (mm):
            6
        
                                
            Overall Length (mm):
            76
        
                        
        Stock Level:
        Bronze
        
        
        £120.15
        
        
        
     
    
        
        Part Number:
        67-514
        
                        
            Cutting Diameter (mm):
            6.35
        
                                
            Length of Cut (mm):
            38.1
        
                                
            Shank Diameter (mm):
            6.35
        
                                
            Overall Length (mm):
            76.2
        
                        
        Stock Level:
        Bronze
        
        
        £140.75
        
        
        
     
    
        
        Part Number:
        67-520
        
                        
            Cutting Diameter (mm):
            9.53
        
                                
            Length of Cut (mm):
            28.58
        
                                
            Shank Diameter (mm):
            9.53
        
                                
            Overall Length (mm):
            88.9
        
                        
        Stock Level:
        Bronze
        
        
        £148.87
        
        
        
     
    
        
        Part Number:
        67-520M
        
                        
            Cutting Diameter (mm):
            10
        
                                
            Length of Cut (mm):
            29
        
                                
            Shank Diameter (mm):
            10
        
                                
            Overall Length (mm):
            76
        
                        
        Stock Level:
        Bronze
        
        
        £143.27
        
        
        
     
    
        
        Part Number:
        67-523
        
                        
            Cutting Diameter (mm):
            12.7
        
                                
            Length of Cut (mm):
            28.58
        
                                
            Shank Diameter (mm):
            12.7
        
                                
            Overall Length (mm):
            88.9
        
                        
        Stock Level:
        Bronze
        
        
        £161.27
        
        
        
     
    
        
        Part Number:
        67-523M
        
                        
            Cutting Diameter (mm):
            12
        
                                
            Length of Cut (mm):
            29
        
                                
            Shank Diameter (mm):
            12
        
                                
            Overall Length (mm):
            88
        
                        
        Stock Level:
        Bronze
        
        
        £155.66
        
        
        
     
    
        
        Part Number:
        67-526
        
                        
            Cutting Diameter (mm):
            12.7
        
                                
            Length of Cut (mm):
            53.98
        
                                
            Shank Diameter (mm):
            12.7
        
                                
            Overall Length (mm):
            101.6
        
                        
        Stock Level:
        Bronze
        
        
        £173.20