Features:These hair trimmer replacement blades are corrosion-resistant and wear-resistant, suitable for long-life use and can stay pointed, sturdy and reliable to be applied for a long time.Each piece of hair clipper replacement blade is designed with 2 holes, which makes it considerate and convenient for you to operate, brings you cleaner and more stable hair cutting experience, also be applied smoothly to gild through most hair types with ease.Our adjustable hair clippers blades are compatible with 8148, 8504, you can just replace the blades according to your needs, and no need to choose a new clipper, with correct installation, it can work as effectively as a new one.Make the adjustable lever of the blade go to the full forward position, place the small top blade over the clipper drive finger, then place the large bottom blade on top of small top blade, use screws and partially tighten, keep sure that the extreme left hand tooth of top blade is aligned to the first small tooth of bottom blade, then you can tighten screws, you can switch on and off several times to make sure whether you have aligned blades.SpecificationName:Clipper BladeType: trimmer For MenFunction: For Wahl Clipper 8148, 8504 Replacement Bladecolour:BlackMaterial:stainless steelsize:As shownPackage Contents:1 Set x hair clipper bladeNote:Please be aware that due to your computer monitor display the color may have some difference between the picture and the real item.There is 2-3% difference according to manual measurement.