Rotozip spiral saws are popular tools, so it's no surprise that people are also hot after Rotozip bits and accessories. This five-pack of saber-cut bits, which are used to make jig-saw-like cuts with the Rotozip, is always high on our top-sellers list--and why not? The pack offers a nice variety of general-use bits at a very reasonable price. In tests, we ran them through a large variety of wood and composite materials--just about every type of scrap we had lying around the shop--and as long as we didn't push too hard (let the tool do the cutting) they performed like champs. Keep in mind that these particular bits are for cutting wood and composite materials. Rotozip also makes a bit for tile, a carbide bit for concrete board and plaster, and various "guide" bits for cutting around in-wall obstacles such as electrical outlets.