Set of Link plates for BL switch interlock as per Drg. No. B/ TRS/ RC/ 4/ 295 as follows. 1 ) Ref no. 1 ( Two holes ) of Drg. No. B/ TRS/ RC/ 4/ 295. Qty/ set. = 30 nos. 2 ) Ref no. 2 ( Three holes ) of Drg. No. B/ TRS/ RC/ 4/ 295. Qty/ set. = 04 nos. Note: One sample set should be got approved before effecting bulk supply.