Guide combs are equipped with powerful magnets to securely attach to clipper blades without springs or clips. Plastic combs have a smooth chrome finish for faster hair feeding and smoother cutting. Fit all #10 size clipper blades. Eight-piece comb set has cut lengths from 5/8" to 1 1/4". Material: Plastic combs have a smooth chrome finish Size: Combs are available in the following sizes: #0 has a 5/8" (16 mm) cut B has a 13/16" (21 mm) cut #2 has a 3/8" (10 mm) cut C has a 7/8" (22 mm) cut #1 has a 1/2" (13 mm) cut E has a 1" (25 mm) cut A has a 3/4" (19 mm) cut F has a 1 1/4" (32 mm) cut Hook groove under teeth on comb over toothed edge of blade, center blade between the guides on either side of the comb, and let the comb snap down onto blade. Magnet will hold comb in place.