Wedge-Shaped Test Finger Probe for Document Shredder Safety | IEC 61032 & EN 60950 Compliance Testing Tool – Precision Stainless Steel Probe 25mm × 80mm Product introduction: When it comes to checking if office gadgets are safe, like paper shredders and printers, you gotta look at everything. Our Wedge-Shaped Test Finger Probe (Model HT-U14) is made to be super exact and last long. It's built to act like a human finger touching these machines, so we can see if they're safe.