cuts. I quarreled between them or mere pebbles. It worked perfectly. I had a great opportunity to cover a 30 foot geodesic dome. Remove cedar shingles and lay asphalt. After the first weekend, when I learned how I was going to install the shingles on the circular building, I realized that I would have to cut almost every shingle I would install on the building to different lengths and angles. With these scissors I cut 76 packs of shingles of different lengths and different patterns. I've used them to cut shingles around edges or moldings. Cutting around air ducts or around the edges is very easy. Apparently they cut through warm tiles more easily, but even cold tiles cut through them with little or no effort. You need a steady hand to cut shingles directly with them, unlike a plumb bob, but the portability and the ability to carry it with you on a roof or stair and set the cutters and direction from the drill bit is Nice. After cutting all that shingle and throwing that tool around for 5 months while working on this building on the weekends, I realized that while I would never choose to do that roofing and pay someone to do it as next to do but it was the best solution and money spent on a tool to make my life easier. In addition, these blades do not dull at all. I could use them to do it a second time with no problems. I was planning to sell them after the roof is done but I will keep them for myself and lend them to the family for their roofing projects. I have no complaints.