WoYu hair clipper replacement blade adjustable clipper blade 2 hole hair trimmer replacement blade compatible with Wahl 1006, Super Taper #8400How to align the blade: 1. Move the blade adjustment lever to the full forward position. 2. Loosen the screws enough so the blades are still held in place, do not remove the screws. 3. Position the tips of the top blade teeth between 0.8-1.6 mm back from the bottom blade, so the blades do not cut too close or allow the moving blade to touch the skin. 4. Align bottom blade with the top blade, ensure that the extreme left hand tooth of top blade just on the first small tooth of the bottom blade, and the extreme right hand tooth of the top blade must be touching the big tooth on the bottom blade. 5. After blade is aligned, tighten the screws to hold the blades in place. 6. Turn switch on and off a couple of times, and then check alignment of bladesicable models: The 2 hole clipper replacement blade is compatible with Wahl 1006, Super Taper #8400, Super Taper II #8470-500, Icon #8490-900 Pro Basic, Taper 2000 #8472-850, the 5 Star Senior #8545, Magic Clip #8451, the Sterling 3, Sterling 9 #8145, and Reflections Senior #8501. Note: Please allow a little difference in size because of manual measurement. Remember to clean dirt and hair from the clipper with brush before replacement. It is important to clean up immediately after each use and remember to replace the blade regularly. Pointed items, please be careful when using and store them in places that away from kids.