Light weight spanner for fish plate bolts as per following specification: ( 1 ) Double open ended with 15 degree angle ( 2 ) Size 36mm and 41mm at either end. ( 3 ) Length 680mm ( min ) 760mm ( Max ). ( 4 ) Manufactured by forging process with black hosphate finishing ( 5 ) Heat treatment with controlled oil hath process., hardness of final product 380- 400BHN ( 6 ) Approx weight 1300 gm- 5 % ( 7 ) Capacity to handle 500 NM Torque without breakage special spanner fish plate bolts conforming to JUS- 4835 Or similar ( advance approval of sample to be done )