Spline tips look to be 1/16.. Original box has prior owners name on it…….. Items are described to the best of our knowledge. As per good business practice, all items should be calibrated/checked by purchaser prior to being used. The item “Rare Tesa spline digit, 0001 pin 0-1 micrometer Swiss tool tools” is in sale since Thursday, November 12, 2020. This item is in the category “Business & Industrial\CNC, Metalworking & Manufacturing\Metalworking Supplies\Other Metalworking Supplies”. The seller is “machinistbox” and is located in Ellington, Connecticut. This item can be shipped worldwide.