Set of two handheld sharpening stones. These whetstones are used as a knife sharpener or honing stone. Carborundum sharpening stones. The red and green handles make for a nice display.
Plucked from google: Sharpening stones, water stones or whetstones are used to grind and hone the edges of steel tools and implements. Examples of items that may be sharpened with a sharpening stone include scissors, scythes, knives, razors and tools such as chisels, hand scrapers and plane blades.
The red handled honing stone is marked No. 57 and CA which are the first two letters of the brand name Carborundum and appears it may have been longer but may have been broken off. The one with the green handle is in good condition.
Red one measures 8" long and the stone at the end is about 1 1/4" diameter but is more oblong shape. The green stone is 7 1/4" long and the stone is 1 1/4" wide.