supply of torque wrench with adjustable, interchangeable ratchettorque wrench with adjustable, interchangeable ratchet,torque wrench with adjustable, interchangeable ratchet head/open end insert having controlled bi directi onal tightening with other specification as below. 1. torque range: 10-50 nm (7.5-37 lbf.ft) 2. weight: 1.00 kg. or less. 3 . length: 400 mm or less. 4. material: steel higher grade 5. square drive size: 1/2 inch. 6. least count: 0.5 nm. 7. open end head of size 9*12: 13 mm, 17 mm, 19 mm (open end). 8. 1/2 inch socket of size: 13 mm, 17 mm, 19 mm. item to be supplied with its purchase and test report certified by oem/govt. recognized agencies. the torque wrench is made u p of 6140 grade chrome venedium steel or stainless steel. [ warranty period: 30 months after the date of del ivery ] ]