Fig. 261 illustrates one form of outside calipers, and Figs. 58 and 132 show how the outside calipers are held. Fig. 262 illustrates inside calipers. Fig.

263 shows how the inside calipers are held. There are many styles of these very useful tools. The chief difference is that some have a device for fine adjustment, and others do not.

Those having a screw adjustment are better for the beginner to use.

Fig. 261. Outside Calipers.

Fig. 262. Inside Calipers.

Fig. 263. Using Inside Calipers.

If the points are sharp, they may catch in the wood, and, therefore, they should be rounded, as shown in Fig. 264. If the ends are not rounding, do not attempt to use them while the lathe is in motion.

Fig. 264. Caliper Ends.