We walk in the dark places no others will enter
We stand on the bridge and no one may pass

DECLARE @value varchar(20)
SELECT @value = 'ks105'

SELECT STUFF(@value, 1, 2, '') AS [Stuff], 
	SUBSTRING(@value, 3, 18) AS [Substring], 
	RIGHT(@value, LEN(@value) - 2) AS [Right]