BT40SRKIN7/8X3.540 Rotary Tooling ShrinkIn ISO Item #BT40-88SF354-9 Ingersoll Part #2917880 SS - Connection Code Machine Side: BT40. L - Gauge Length: 3.540. J - Pre-set Screw: M16. d2 - Bore Diameter : 0.875. D2 - Body Diameter 2: 1.650. D1 - Nose Diameter : 1.300. L Max - Throat Depth Max.: 2.040.