100mm Grinder Disc & Flap Disc Holder “A quick print that saves time in the workshop – fits 100mm & Makita discs perfectly.” Keep your workshop organized with this 3D printable holder for 100mm (4”) grinder discs and flap discs, designed to fit standard angle grinder accessories, including Makita 100mm discs. Perfect for DIYers, makers, and metalworkers who want quick access to their cutting, grinding, and sanding discs.