This is the second electric scissor kit that I've bought. I have the red and black kit and the new one is green and black. I am really impressed with these, both identical kits. I have used my scissors loads of times and the blade has not gone blunt. Because it vibrates fast it doesn't need to have razor sharp blades, (like a garden strimmer cuts grass with a blunt plastic line). It cuts through several layers of leather easily, and leather is difficult to cut with an ordinary pair of scissors. I like this kit the best, with 2 blades and 2 lithium batteries. The batteries last for ages. One thing they are brilliant for is making leather insoles. I stick a sheet of leather on to some insoles with glue for shoes. When it's dry I run the scissors around the edge and then I have a pair of fantastic leather insoles. You can cut incredibly straight with these through material or cardboard, paper etc. I love both sets of electric scissors, it's money well spent!