| DRILL AMERICA, INC. | 
                        P12000089060 | 
                        Active | 
                    
                    
                        | DRILLAMEX, INC. | 
                        829986 | 
                        INACT | 
                    
                    
                        | DRILL-A-WELL, INC. | 
                        381890 | 
                        INACT | 
                    
                    
                        | DRILL BOSS LLC | 
                        L25000341196 | 
                        Active | 
                    
                    
                        | DRILLBOTS GMBH LLC | 
                        L11000060261 | 
                        INACT | 
                    
                    
                        | DRILL BOX LLC | 
                        L21000499781 | 
                        Active | 
                    
                    
                        | DRILL BUILD LLC | 
                        L22000318780 | 
                        INACT | 
                    
                    
                        | DRILLCO DEVICES, LTD. INCORPORATED | 
                        P16041 | 
                        INACT | 
                    
                    
                        | DRILLCO EQUIPMENT CO.,INC.OF FLORIDA | 
                        336968 | 
                        INACT/MG | 
                    
                    
                        | DRILLCO HOME & COMMERCIAL SERVICES LLC | 
                        L20000374433 | 
                        INACT | 
                    
                    
                        | DRILLCON, INC. | 
                        S59123 | 
                        INACT | 
                    
                    
                        | DRILLCO NATIONAL GROUP, INC. | 
                        F07000004882 | 
                        RPEND/UA | 
                    
                    
                        | DRILL CONCEPTS, INC. | 
                        L86204 | 
                        NAME HS | 
                    
                    
                        | DRILL CONCEPTS INCORPORATED | 
                        L86204 | 
                        INACT | 
                    
                    
                        | DRILL CONSTRUCTION, INC. | 
                        607379 | 
                        INACT | 
                    
                    
                        | DRILL CONSTRUCTION CO., INC. | 
                        F00000001549 | 
                        INACT | 
                    
                    
                        | DRILL CONSTRUCTION CO., INC. | 
                        F06000002528 | 
                        INACT | 
                    
                    
                        | DRILLCON U.S.A. INC. | 
                        G29752 | 
                        NAME HS | 
                    
                    
                        | DRILL D&C LLC | 
                        L24000209146 | 
                        Active | 
                    
                    
                        | DRILL DENTAL LLC | 
                        L21000479023 | 
                        Active |