3/4-20 hss tap and die set, unef machine thread tap and unef round thread die right hand aszlbym modle:3/4"-20 tap and die <br><br> 1. sharp blade: full grinding thread, sharp and durable, tap automatic fine grinding process, clear thread, sharp blade, to meet the processing requirements.<br> 2. high efficiency: chip removal, high efficiency, debris rapidly discharged in the tank. no blocking, fast efficiency.<br> 3. round die: not easily broken tooth chip fast, abrasion resistance and long service life. 4. round die good balance: no vibration, especially for power tools. <br> 5. round die lock hole: cone lock hole, lock strong, not loose.<br> if there is anything taps or dies you need, do not hesitate to contact us. there are a variety of sizes available but they are not all listed.