NTools TR125U/G and NTools150U/G dia. 125mm and 150mm, 15mm and 18mm thick with replaceable fixing bolts, 5/16? thread or M8. Purposed for eccentric sanders and grinders. Made from soft Polyurethane (PU) foam resistant to deformation, provided with holes for dust extraction and ventilation. ADVANTAGES: Holes configuration that ensures for ventilation and heat reduction during long-time work; Resistant to damage flexible Polyurethane foam that ensures long service life of disk and precision during work; Two 5/16? threaded and M8 bolts compatible with widely used eccentric sanders and power grinders.