These bits are by no means interchangeable.1. They have a different shape.2. The Hex part of the XtremepowerUS Tamper Shank is much thicker than the bit that fits on the Bosch jackhammer, it's so thick it doesn't even fit in a Bosch.3 Even if the XtremepowerUS shank did fit in the Bosch it would due to due to the different groove arrangement. I would like to say that the XtremepowerUS Tamper Shank feels very high quality. I am sure it is very hard. However, I am annoyed that it was not specified that this bit does not fit Bosch jackhammers. If 1/8" jackhammer bits had been standardized this problem would never have arisen. Buyer warning!