The phrase "convenient instrument" is grammatically correct and can be used in written English.
Example: The smartphone has become a convenient instrument for communication and accessing information.
Another thing that Syrians don't need is for such a war to be treated as a convenient instrument in a separate project.
Kadyrov's forces represent a convenient instrument for the Kremlin: obedient, battle-hardened troops who can be counted on for messy missions.
Economics thus becomes a convenient instrument the state uses to manage the economy, rather than a tool the public turns to for enlightenment about how the economy operates.
But it is fair to say that they are joined by a sure instinct that hatred of the Jews is a timelessly convenient instrument of propaganda and cohesion.
I hit them with 'neo-Nazi,' I hit them with everything!" It was striking that, for him, "neo-Nazi" had been reduced to a convenient instrument of self-justification, rather than a cause for questioning or concern.
As Ptolemy showed in his Planisphaerium, the fact that the stereographic projection maps circles into circles or straight lines makes the astrolabe a very convenient instrument for reckoning time and representing the motions of celestial bodies.
The appearance of high-quality, low-cost silicon transistors in the early 1960s enabled electronic instrument designers to incorporate all the basic synthesizer features in relatively small, convenient instruments.
A prime reason for the attention to class size is that it represents such an extremely convenient policy instrument, one amenable to general political action.
Thankfully the advert ended before he snapped and took both their lives using the Wii balance board as a convenient blunt instrument that would also record the number of calories burned during a double homicide.
The Chinese version of the PSP is a convenient and valid instrument to assess the personal and social functions of stabilized and acute patients with schizophrenia.
The mainland Chinese version of the WHOQOL-BREF questionnaire is a convenient and useful instrument for assessing the QOL in a large-scale Chinese population.
