It's because it's classic design is so versatile and functional. The jaws can be set to hold odd or irregular shapes easily, clamp parts together for assembly, keep parts steady for machining, or make a base for holding small parts safely. It's one of those great items where the more you use them, the more uses you find for them.
The jaws are made from selected straight grain, seasoned hard maple. The spindles and nuts are made from cold-drawn steel with special double-lead threads. They are machined for quick adjustment, strength and durability. Seasoned hardwood handles. Sizes listed below indicate overall jaw length. USA
Part # Overall Jaw Max. Opening Reach - Middle Spindle
Length Between Jaws to Jaw Tip
352852 8" 4-1/2" 4"
319907 10" 6" 5"
319916 12" 8-1/2" 6"