The 2mm steel plate is zinc plated against corrosion, and the ends are bent inwards to maximise the pushing capacity. Stainlees steel nuts and bolts are used for effortless replacement of rubber blade. The 5mm thick blade blade may reversed for longer life. Replacement blades (24RSYCRU) are available. Recommended handles A60/2 or ALH4. A wider version, 32ZPSYC, is available.