Fig. 218. Scratch-Awl.

The auger-bit-gage, Fig. 219, is a convenient tool for measuring the depth of holes bored, but for ordinary purposes a block of wood sawn to the proper length thru which a hole is bored, is a satisfactory substitute.

Fig. 219. Auger-Bit-Gage.

Screw- and wire-gages, Fig. 220, are useful in measuring the lengths and sizes of screws and wire when fitting or ordering.

Fig. 220. Screw- and Wire-Gages. a. Screw-Gage. b. Wire-Gage. c. Twist-Drill-Gage.

The spirit-level, and the plumb-line which it has largely replaced, are in constant use in carpentering, but are rarely needed in shopwork.

Blackboard compasses, triangles, etc., are convenient accessories in a woodworking classroom.