... between the percussion drill and a stationary forward end drill rod support.(1)Material/Grade:DIN CK45, JIS S45C, SAE1045, AISI1045 ... .43-0.55)(4)Length:Blasting furnace Tap hole drilling rod: 1.0m-6mWe serve customized design, production and serve according ... Rock Tools Co Ltd is an ISO 9001:2008-certified manufacturer of high quality, competitively-priced rock drilling tools, as well ...