EBC brake shoes are made using high pressure Die cast alluminium platforms with bonded brake linings. All shoes are radius ground and edge trimmed and also feature lead in and lead out chamfers at lining ends and original equipment style brake shoe springs.
For off road use years ago people used to cut slots in the brake shoe lining with a hacksaw. Not only was this a stupid practice because of the dust emitted, it was not necessary and should never be tried. Even considering EBC brake shoes are NON ASBESTOS and there is no bad dust in there, ANY dust is bad and sanding or cutting linings is a total NO.
We do this for you my molding the grooves in to the liner professionally and accurately to improve brakes in the wet mud and sand.