LATHE QUICK CHANGE TOOL POST HOLDERS. HOLDS; 1IN SHANK TOOLING. THE OTHER HOLDER HAS A TAPER ON THE ID. DURING THE WORK WEEK. THANK YOU FOR LOOKING AT MY ITEMS I HAVE FOR SALE. IF YOU HAVE ANY QUESTIONS PLEASE FEEL FREE TO MESSAGE ME. I WILL TRY TO RESPOND IN A TIMELY MANNER THANKS.