This jar opener is made of heavy stainless steel and solid hard plastic handle that will last and not rust. This is sturdy and Durable - Suitable for jars with lids between 1” to 3.7” diameter. The jar opener is made of sturdy material and super durable. It is easy to Twist - The stainless steel teeth on the clamp grab the edge of the lid tightly and hold it the entire time you are twisting.