Walter Tools India Pvt. Ltd. Offers Paradur Synchrospeed Treading Tool. Walter Tools India Pvt. Ltd. Is an ISO 9001, 14001 and OHSAS 18001 certified. The Paradur Synchrospeed Treading Tool has been specially developed for synchronous tapping [rigid tapping] in a wide variety of materials. Besides structural steel and high strength steel, these tools can also be used in stainless steel, spheroidal graphite and malleable cast iron as well as in long-chipping copper and aluminium alloys.