All plastic construction will not rust. Helps prevent hazardous sparks when cleaning-up flammable fluids. Safe to use on delicate tile and marble floors. Great on uneven floor surfaces. One-piece rubber squeegees sanitary, solid one-piece construction minimizes possible contamination areas; reduces dirt and bacteria collection Double foam rubber squeegees. Integral blade eliminates seams, and crevices inherent in conventional double foam blade. Eliminates places for bacteria to grow. Excellent for use on smooth surfaces. Available in nine colors supporting HACCP compliance. Use standard threaded handles for a secure fit; recommend 40225 Sparta[R] Spectrum[R] self-locking Flex-Tip[TM] handle (sold separately).