The angle-drive drills are attached to the drill motor by an adapter assembly or clamped into the existing drill chuck. They are available with a ridged or flexible drive shaft and come in several different head angles. See figure 13-13. These units are designed to be used as an extension of the drill motor in hard to reach areas. The drill motor should never be started unless you have positive control of the angle-drive unit. The flexible shaft is commonly referred to as a snake drill. The drill chuck normally requires a wrench to tighten the jaws or it may require a special threaded drill bit.

Special tools are not normally part of an individuals toolbox. These tools are normally maintained in a central toolroom and signed out when needed.

Figure 13-13.-Angle-drive drills.