The hammer is made of high-grade steel, carefully tempered head and peen; the head is usually made cylindrical with slightly rounding face; the eye of the hammer is the center opening through which the handle is inserted. The peen of a hammer is the opposite end to the face, and terminates in a rounded or wedge-shaped point.
Note.—In its use the hammer should be grasped near the end of the handle, giving it a free arm swing, and carrying the head through a nearly vertical plane. If the plane of the swing approaches a horizontal the weight of the hammer will produce a twisting effort on the fore-arm, which will be very tiresome. The handle should be grasped with only sufficient force to safely control the blow.
Fig. 630.
Fig. 631.
Fig. 632.