drill attachment / top hammer

The Sandvik drifting and tunneling tools have the following dimensions. For thread R25, it has a diameter of 1 in and a hole range of 38 to 89 mm. Next, R28 is 1 1/8" in diameter and has a hole range of 38 to 89 mm. R32 has a diameter measurement of 1 1/4 in and a hole range of 43 to 127 mm. Alpha 300 has the same dimension and capacity with R32. R35, on the other hand, has a diameter of 3/8 in and a hole range of 43 to 127 mm. Finally, R35 Extra has a similar dimension but with a hole range of 54.