The Black and Decker A6296 40cm Replacement Chain has a 0.050in (1.3mm) gauge and a Semi Chisel Chain with Bumper Link, Low Profile 3/8in extended pitch. The bumper links help to reduce kickback (57 links) and conforms to the ANSI low kickback requirement. Easy to file and maintain using the Black and Decker sharpening kit and fits the following machines GK1940T, GK2240T, CS2040 and CS1840. Specification Length 40cm.