A power tool comprising: a motor assembly; a base assembly; and a clamp assembly coupled to one of the motor assembly and the base assembly to selectively provide a retention force to the other of the motor assembly and the base assembly to removably couple the motor assembly and the base assembly, the clamp assembly including a handle member, a fulcrum member, and a biasing lever member, the biasing lever member including a first portion, the handle member coupled to the first portion of the biasing lever member, the handle member movable between an open position and a closed position, the handle member rotating the first portion of the biasing lever member about the fulcrum member when moving from the open position to the closed position, and the handle member rotating the first portion of the biasing lever member about the fulcrum member when moving from the closed position to the open position; wherein the one of the motor assembly and the base assembly defines an axis, wherein the handle member includes a cam surface and the clamp assembly includes a support surface, the cam surface camming against the support surface; characterised in that the biasing lever member includes the first portion and a second portion disposed on opposite sides of the fulcrum member, wherein when the handle member moves between an open position and a closed position, the handle member rotates the first and second portions (55, 57) of the biasing lever member about the fulcrum member when moving from the open position to the closed position, causing the second portion of the biasing lever member to provide the retention force to removably couple the motor assembly and the base assembly, and when the handle member rotates the first and second portions (55, 57) of the biasing lever member about the fulcrum member when moving from the closed position to the open position, it causes the second portion of the biasing lever member to reduce the retention force; wherein when the cam surface cams against the support surface it thereby pulls the first portion of the biasing lever member away from the axis to rotate the first and second portions (55, 57) of the biasing lever member about the fulcrum, thereby causing the second portion of the biasing lever member to provide the retention force. a motor assembly; a base assembly; and a clamp assembly coupled to one of the motor assembly and the base assembly to selectively provide a retention force to the other of the motor assembly and the base assembly to removably couple the motor assembly and the base assembly, the clamp assembly including a handle member, a fulcrum member, and a biasing lever member, the biasing lever member including a first portion, the handle member coupled to the first portion of the biasing lever member, the handle member movable between an open position and a closed position, the handle member rotating the first portion of the biasing lever member about the fulcrum member when moving from the open position to the closed position, and the handle member rotating the first portion of the biasing lever member about the fulcrum member when moving from the closed position to the open position; wherein the one of the motor assembly and the base assembly defines an axis, wherein the handle member includes a cam surface and the clamp assembly includes a support surface, the cam surface camming against the support surface; characterised in that the biasing lever member includes the first portion and a second portion disposed on opposite sides of the fulcrum member, wherein when the handle member moves between an open position and a closed position, the handle member rotates the first and second portions (55, 57) of the biasing lever member about the fulcrum member when moving from the open position to the closed position, causing the second portion of the biasing lever member to provide the retention force to removably couple the motor assembly and the base assembly, and when the handle member rotates the first and second portions (55, 57) of the biasing lever member about the fulcrum member when moving from the closed position to the open position, it causes the second portion of the biasing lever member to reduce the retention force; wherein when the cam surface cams against the support surface it thereby pulls the first portion of the biasing lever member away from the axis to rotate the first and second portions (55, 57) of the biasing lever member about the fulcrum, thereby causing the second portion of the biasing lever member to provide the retention force.