supply of drill bit , tct annular core drill bit m20mm diameter and 35mm cutting depth with universal/weldon shank suitable for light weight rail drill machine and suitable pilot pin against each drill bit (advance samp le to be approved by consignee before bulk supply) [ warranty period: 30 months after the date of delive ry ] ] , tct annular core drill bit m 20mm diameter and 35mm cutting depth with universal/weldon shank suitable for lwrdm along with suitable pilot pin (advance sample to be approved by consignee befor e bulk supply) [ warranty period: 30 months after the date of delivery ] ] , hss taper shank drill bit 26.5 mm, make/brand: addison/miranda/it/surpass [ warranty period: 30 months after the date of delivery ] ] , hss taper shank drill bit. size 18 mm. make: addison or it or bosch or miranda. [ warra nty period: 30 months after the date of delivery ] ] , hss twist drill, morse taper shank 28 mm diameter with working length (mm): 170 m m or more (advance sample to be approved by consignee before bulk supply) [ warranty period: 30 mon ths after the date of delivery ] ]