Handscrew
From DT Online
Description
Traditional Handscrews are were made entirely of wood, with Beech jaws and Hornbeam screwthreads. Later models have metal screwthreads. They are available in opening sizes from 50mm to 400mm.
Features and Applications
Handscrews are used for similar tasks to a G Cramp or Bar Clamp and they have generally been replaced by them.