Stanley compact chalk line stht47147 is less than half the size by volume of standard chalk reels it has a 30 precision line snaps clean with accurate lines and a high impact abs housing that is durable and light also has soft grip over moulding that provides more user comfort and a secure grip the 31 rewind gear ratio retracts the line 3 times faster than a standard 11 reel its slide open door allows for quick chalk refills and has a compact reel chalk capacity that gives upto 50 lines per refi