Code point
U+23E1
Glyph appearance depends on your fonts.
U+23E1
SmU+23E1 BOTTOM TORTOISE SHELL BRACKET is a Unicode 16.0.0 character in the Math Symbol category. It belongs to the Miscellaneous Technical block.
Choose the representation you need, then copy its value.
U+23E1
9185
⏡
⏡
E2 8F A1
23E1
000023E1
%E2%8F%A1
\u23E1
\u23E1
\u23E1
\23E1