OLFA 9061 HB 20B Extra Heavy Duty Blade 20 Pack STE Skinning aluminum doors and working CHP 8888AAGM Skinning aluminum doors and working on non structure quarter panel's require technicians to use hand steel tools when used on aluminum that isolate the striking components to protect from galvanic corrosion but also require the removal and installation of User's (Self Piercing Rivets) as well as replacing the aluminum skin with a rope hem as part of the repair process laptop or PC with an appropriate card reader for analysis and printing for additional diagnostics Fits any OLFA extra heavy duty knife Long lasting durable snap off blade a new sharp edge with each snap