There are many dog grooming shears on the market, but they all fall into two main types of blade edges: beveled and convex. Choosing the right edge will depend on the thickness of the dog's coat and the hair length.
Beveled blades.
Beveled-edged grooming shears, sometimes called German-edged shears, are built to groom dogs with thicker coat hair. These blades are not as sharp as convex blades, but they're incredibly durable. Small grooves in the blade act to hold strands of fur in place while the groomer works their magic. German-edged shears are excellent at removing a lot of hair quickly and thinning thick hair.
Convex blades.
Convex blades are designed with a smooth edge to provide an extremely accurate cut. These blades are the grooming tool to use when you're putting the finishing touches on a pup's coat. The sharp, precise edge of convex blade shears allows groomers to create incredibly smooth, flawless cuts.
One more thing to keep in mind when you're selecting your shears. Don't forget to consider the length of the blade. How long your shears are makes all the difference when working on different-sized dogs. The grooming scissors you use on a big fluffy Newfoundland will differ from the shears you use on a petite corgi.