Fig. 176. Steel-Bar Carpenter's Clamp. a. Steel Bar. b. Frame. c. Tip. d. Screw. e. Crank. f. Slide. g. Dog.

Iron Handscrews, also called C clamps and carriage-makers' clamps. Fig. 177, are useful in certain kinds of work, as in gluing in special places and in wood-carving. All iron clamps need blocks of soft wood to be placed between them and the finished work.

Fig. 177. Iron Handscrew, (Carriage-Maker's Clamp).

Pinch-dogs, Fig. 178, are a convenient device for drawing together two pieces of wood, when injury to the surfaces in which they are driven does not matter. They vary in size from ¾" to 2¾". For ordinary purposes the smallest size is sufficient. For especially fine work, double-pointed tacks, properly filed, are convenient.

Fig. 178. Pinch-Dog.

The bench-hook, Fig. 179, is a simple device for holding firmly small pieces of work when they are being sawn, chisled, etc. It also saves the bench from being marred. The angles should be kept exactly square.

Fig. 179. Bench-Hook.