Bitstock

brace (def 3).
noun
the handle or stock of a tool into which a drilling bit is fixed

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Bit-stop
bit gauge. a device for stopping a bit when it has reached a desired depth.
Bit--stream
a simple contiguous sequence of binary digits transmitted continuously over a communications path; a sequence of data in binary form. noun (computing) a sequence of digital data transmitted electronically bit stream or bitstream (bĭt’strēm’) The transmission of binary digits as a simple, unstructured sequence of bits.
Bitstream
a simple contiguous sequence of binary digits transmitted continuously over a communications path; a sequence of data in binary form. noun (computing) a sequence of digital data transmitted electronically bit stream or bitstream (bĭt’strēm’) The transmission of binary digits as a simple, unstructured sequence of bits.