Probing Devices Pairee group boasts of a diversified portfolio of companies including Jyothi Industries. Our Products Below are some of our standard and customized products. Spares For Probing Devices These products are made of high quality alloy steel which conforms to DlN Standards/Customer specifications, hardened and ground to give long life. Mechanical Edge Finders These products are made of high quality alloy steel which conforms to DlN Standards/Customer specifications, hardened and ground to give long life.