Easy to use,inert the plug in the drain hole and tighten the handle until a slight resistance is felt, the plug will now be held firmly in place.All metal parts are composed of bronze casting and the rubber parts are made of oil resistant NBR. 

使用简单，将塞子插入到排水孔中，旋紧手柄，直到感到轻微的阻力，塞子即被牢固地夹持到位。所有的金属部件由黄铜铸件组成，橡胶部件用耐油NBR制成。