Andis fine replacement metal cutter blade. Fits standard detachable style blades. Replacement metal cutter for #40 and #50 blades (excludes OA F/D, OA, 1, 1A, 1-1/2, 2, 3-1/2, 30, 15, 10, 9, 8-1/2, 7FC, 7, 5FC, 5, 4FC, 4, 3-3/4FC, 3-3/4, 3/4″HT and 5/8″HT Andis blades) Metal cutter blade consisting of 22 fine teeth. Made of quality durable material and has minimal chance of teeth on cutter chipping. Cutter blade comes sharp and is ready to use. Does not include the comb/deck. Excessive or long periods of use can cause metal cutter to heat up.  Ensure to keep blades oiled to reduce blades from heating up. Regular cleaning, oiling and storing your blades in a low humidity environment will help avoid corrosion causing rust to develop on blades. Also available in coarse.