THE NIKKEN BT40-WE1-85 IS A CAT 40 TOOL HOLDER, MODEL BT40-WE1-85. ITS OVERALL LENGTH WITHOUT THE BUTTON IS 6 INCHES, AND 7.5 INCHES WITH THE BUTTON. THE TOOL HOLDER FEATURES A PROJECTION OF 3.25 INCHES. IT HAS AN INNER BORE DIAMETER OF 1 INCH AND AN OUTER BORE DIAMETER OF 2.35 INCHES. THIS COMPONENT IS MANUFACTURED BY NIKKEN.