I have a Roomba 650 and the corner brush broke 3 years ago a few months after I bought it. I just neglected the importance of the corner brush and wasted time on it after the Roomba was done. I should have invested in this kit. All the details fit in perfectly. A torx screwdriver is required to install the corner brush, but installation takes literally less than a minute. And I mean the amount of spare parts provided is just amazing. Excellent value for money and quality. The Roomba 650 is a compact dust-killing device, but it needs a little attention and care to perform at its best. This is a TLC kit.