Supply Of Mechanical Jack Lifting Equipment 10 Ton Capacity Confirming To Is 3832- 2005 The Frame Of The Block Shell Be Design For Proper Strength, The Hardness Of The Pawl Tip Shell Not Be Less Then 40 Hrc And That Of Ratchet Not Less Then 30 Hrc. Welding Shall Not Be Used As A Method Of Retention Or Sealing Ect..