| 
                        Rebuild Kit & Seal kit  3 1/2"  DTH-RH550-6in                     | 
                                                    
                            
                                             | 38-68D08-04 | 
                                
                | 
                        O-ring top sub ID (2)DTH-RH550-6in                     | 
                                                    
                            
                                             | In seal kit 2DTH-RH550-6in | 
                                
                | 
                        Top sub with 3 O-rings 3 1/2" DTH-RH550-6in                     | 
                                                    
                            
                                             | 33-68D08-04A | 
                                
                | 
                        O-rings - guide sleeve, bit retainer (3) DTH-RH550-6in                     | 
                                                    
                            
                                             | In seal kit 3DTH-RH550-6in | 
                                
                | 
                        O-ring top sub OD (1)DTH-RH550-6in                     | 
                                                    
                            
                                             | In seal kit 1DTH-RH550-6in |