XTP™ PVC Steel Toe Knee Boots, 15 in H, Size 6, Black Gray Yellow ORS NASCO High performance flap disc for maximum High performance flap disc for maximum stock removal on steel and stainless steel (INOX) the product wicks between engaged threads and eliminates the need for disassembly prior to application Product cures when confined in the absence of air between close fitting metal surfaces Prevents loosening and leakage due to shock and vibration Can also fill porosities in welds injection molded footwear is 100% waterproof to ensure workers' feet are dry and comfortable Outsole perimeter is formulated for tough long wear and traction on slick surfaces Steel shank is longer