Script to Strip Non Numeric Characters from string

Below sample script strips (removes) non numeric Characters from string (varchar)

DECLARE @VARCHARString VARCHAR(8000)

SET @VARCHARString = '000012W`''ASDASDS3A@!#@!#_)+)_4)'

SELECT @VARCHARString

--Remove non numeric charecters from the varchar variable
WHILE PATINDEX('%[^0-9]%', @VARCHARString) > 0
 SET @VARCHARString = STUFF(@VARCHARString, PATINDEX('%[^0-9]%', @VARCHARString), 1, '')

SELECT @VARCHARString