bitstock

[bit-stok] /ˈbɪtˌstɒk/
noun, Machinery, Carpentry.
1.
brace (def 3).
Origin
1880-85; bit1 + stock
British Dictionary definitions for bitstock

bitstock

/ˈbɪtˌstɒk/
noun
1.
the handle or stock of a tool into which a drilling bit is fixed