Regarding the renal stones, stones smaller than 10 mm had a success rate of 90%, while those larger than 10 mm had a success rate of 70%. Stones located in the renal pelvis and upper pole had a success rate of 87.3 and 88.5% respectively, while those located in the lower pole had a success rate of 69.5%. A single renal stone had a 78.3% success rate compared to 62.8% in multiple renal stones . Regarding the ureteric stones, stone size more than 10 mm was one of the strongest independent predictors of failure of SWL