Plain Type:

Self centering hardened tool steel jaws and knurled chuck sleeve.
No. 163 has rigid T-handle.
No. 164 & 166 have sliding T-handle for fitting into tight spaces with greater
leverage.

Reversible Ratchet Type:

Ratchet can be set for the right or left hand operation or locked for non racthet
use.
Self centering hardened tool steel jaws and knurled chuck sleeve provide positive
grip on taps, reamers and small tools.