To comfortably perform cutting and avoid causing any pain to customers, it is recommended to replace the clipper blades every 3 to 6 months. Depending on the frequency of use, replacement after about a year is also acceptable if the clippers are not used very often. After replacement, you should notice a difference in sharpness compared to the old blades. This is a replacement blade (silver) specifically for JRL clippers, sold separately. Features blades that self-sharpen to restore sharpness. Helps create fade styles that maintain a sharp cut for a long time. The cutting height adjustment is very fine, making it extremely convenient for adjusting the shading of fade cuts. The Cool Blade System dissipates heat during use, preventing discomfort for customers. This set includes a blade adjustment tool, an upper blade (moving blade), and a lower blade (stationary blade). Size: Width 45mm Weight: 36g (including blade adjustment tool) Material: Stainless steel, Ceramic