The coping saw is similar in appearance to a hack saw, however it features a deeper throat and thinner blade. The thin blade of a coping saw enables you to easily make curved cuts. If it is a slight curve you can slowly rotate blade and frame together while still cutting. For sharper curves you can turn just the blade with respect to the frame. Coping saws are also commonly used to make inside cuts. This is done by pre-drilling a hole in the work piece and then you remove the blade and insert it in the hole. Lastly you reattach the frame and are ready to cut.