bids are invited for 1. battery operated brushless motor rail bolt tightening device (impact wrench) of special extra long socket 46 mm, 32 mm & 28 mm with mobile connectivity feature with additional socket for plate screw removal and insertion to be supplied. detailed specification as per annexure attached. 2. electrical operated power chain saw 3. bosch drill machine model no bosch gbh 2-28 dv professional 4. supply of makita jn3201 nibbler warranty as per oem and specification as annexure-a 5. portable welding machine 300 amp arc welding 1/2/3 phase 6. clean silica sand, free from clay, loams, mica and other foreign material, as per specification no. aar m-916-51 to be used on all classes of diesel and electric locomotive packing in 30 kgs water proof polythene bags as per rdso letter no. sd.dfm.a.8 dated 28/29.12.2011 and 09/10.09.2013 7. straw board in sheets grade a to size:66 cms x 77.5 cms x 90 dkg specn.no.is 2617/2006 8 clear polycarbonate sheet , thickness 5 mm ,length x breadth : 8 feet x 4 feet total quantity : 6060