I have just reviewed the Kempston set I purchased after purchasing and using this accessory. I am pleased with the performance and a close inspection of the bit's manufacture reveals the quality of the material and construction. I used the bit primarily on my Rotozip so recoil was a big issue. I had nothing to worry about, the racquet's cut left no trace of catch, recoil or chatter. After use, the edge stays as sharp as when you unpacked it. Only a few chips of paint indicated that the racquet had been used at all. The racquet comes in its own high quality vertical clear plastic case which I will take a picture of when the Revain system still allows. I would of course buy again. I ended up going and buying a set! Hooray Steve