Answer:
3. Hacksaw
4. Round point shovel.
Step-by-step explanation:
A backsaw can be defined as a short handsaw with a rectangular blade and a reinforced metal rib (stiffening rib) along its back so as to make the blade perfectly straight and allow for better control. Also, the reinforced metal rib (stiffening rib) helps to give a more precise cut better than other types of handsaw and as a result of this, it is mostly used in woodworking such as cutting tenons, mitres, or dovetails.
3. A hacksaw is a type of saw with a narrow fine toothed blade set in a frame and put under tension, and it's used especially for cutting metal.
4. Round point shovel is the most versatile, resourceful and widely used shovel in various field such as agriculture, civil engineering, mechanical engineering, fishery, horticulture, etc. It is typically used for digging, scooping, or shoveling dirt from one point of the earth (soil) to another. They're usually made of steel or iron and a handle to fit for proper handling by the end users.