Abstract: A hammer has a main unit. The main unit has a handle, a striking head, and a nail puller. The handle has a lengthwise direction, a first end, and a second end. The first end of the handle and the second end of the handle are opposite in the lengthwise direction of the handle. The striking head is disposed at the first end of the handle. The nail puller is disposed at the second end of the handle. The nail puller has a pulling unit with an opening for receiving a nail. The nail puller is thinner than the striking head and allows the hammer to be operated in a small space to remove a fixed nail.

Abstract: A hand tool has a handle, a first working portion, and a second working portion. The hand is elongated and has a top. The first working portion and the second working portion are detachably connected respectively with two ends of the top of the handle. Each one of the first working portion and the second working portion is made of a material different from a material of the handle.