THE JACOBS PART NUMBER 7315N IS AN AO303 TAPER TYPE ARBOR CONSTRUCTED FROM STEEL. IT FEATURES AN OVERALL LENGTH OF 5 1/4 INCHES, WITH A STEM LENGTH OF 5.2700 INCHES AND A SHANK LENGTH OF 5 1/4 INCHES. THE BORE DIAMETER IS 0.37 INCHES. THIS ACCESSORY FEATURES A SPINDLE END OF 3MT (MORSE TAPER 3) AND A SHANK TAPER SIZE OF MT3. THE CHUCK END SIZE AND MOUNT TAPER SIZE IS JT3 (JACOBS TAPER 3). THE TAPER SIZE IS SPECIFIED AS MORSE AND JACOBS. THE PROJECTION MEASUREMENT IS 1.62 INCHES.