A surgical saw, said saw including: a body; a coupling assembly (66, 102, 122, 134) moveably mounted to the body adapted to releasably hold a saw blade (140, 140a, 140b, 140b, 140c, 202, 202a, 240, 246) to the coupling assembly, the coupling assembly including: an anvil and a press, said press capable of movement towards and away from the anvil, wherein said anvil or said press is formed with at least one channel and the other of said press or anvil includes at least one press foot capable of being received in the channel; and an assembly for selectively bringing the press towards and away from the anvil; and a motor internal to the body that is connected to the coupling assembly so as to cause the reciprocating movement of the coupling assembly and the like reciprocating movement of the saw blade to be held by the coupling assembly, characterized in that: said anvil or said press is formed with plural channels; and the other of said press or anvil includes plural said press feet, said press feet being positioned to seat in separate channels; and the assembly for selectively bringing the press towards and away from the anvil is adapted to selectively bring the press towards and away from the anvil so that, when the press is brought towards the anvil, a press foot presses a lock tooth (150, 150a, 180, 210, 214, 218) associated with the blade into a channel associated with the press foot so that the at least one of the press or anvil coins the lock tooth. a body; a coupling assembly (66, 102, 122, 134) moveably mounted to the body adapted to releasably hold a saw blade (140, 140a, 140b, 140b, 140c, 202, 202a, 240, 246) to the coupling assembly, the coupling assembly including: an anvil and a press, said press capable of movement towards and away from the anvil, wherein said anvil or said press is formed with at least one channel and the other of said press or anvil includes at least one press foot capable of being received in the channel; and an assembly for selectively bringing the press towards and away from the anvil; and a motor internal to the body that is connected to the coupling assembly so as to cause the reciprocating movement of the coupling assembly and the like reciprocating movement of the saw blade to be held by the coupling assembly, characterized in that: said anvil or said press is formed with plural channels; and the other of said press or anvil includes plural said press feet, said press feet being positioned to seat in separate channels; and the assembly for selectively bringing the press towards and away from the anvil is adapted to selectively bring the press towards and away from the anvil so that, when the press is brought towards the anvil, a press foot presses a lock tooth (150, 150a, 180, 210, 214, 218) associated with the blade into a channel associated with the press foot so that the at least one of the press or anvil coins the lock tooth. said anvil or said press is formed with plural channels; and the other of said press or anvil includes plural said press feet, said press feet being positioned to seat in separate channels; and the assembly for selectively bringing the press towards and away from the anvil is adapted to selectively bring the press towards and away from the anvil so that, when the press is brought towards the anvil, a press foot presses a lock tooth (150, 150a, 180, 210, 214, 218) associated with the blade into a channel associated with the press foot so that the at least one of the press or anvil coins the lock tooth.