Geometric Threading Head Landis Landmatic 2" capacity. The shank OD 2.750 The ID 2"+. That means you can thread 2" diameter material thru.I have couple sets of chasers 1"- 5 TPI that I used to make 25" long jack screws for customer
twenty plus years ago.I used a J & L #5 Turret Lathe. The head comes with the original instruction book. Thanks! George.