Metal Detectable Handheld Calculator Metal detectable calculators, which are suitable for almost all food applications, including environments with greasy and powdery and cold conditions, are made from a metal detectable “Super X” polymer, which is X-ray visible and has the added bonus of an anti-microbial agent. These calculators perform well in both warm and lower working temperatures, and is also made from high-impact and non-shatter material, so it will not easily damage if dropped or rolled off any work surface. The electronic handheld calculator is compact and lightweight and is small enough to hold in your hand, pocket or attach to a Clipboard. Measures approximately 3.94” x 1.97”. Comes with a removable 30” safety chain. Replaceable DC AG10 1.5V battery.