Parallel Bush Series- Bushes for use where the internal thread will not allow the entry of tapered cones. Tool fits 1/2 & 3/4in BS1010 New Series & BS5412 flat & bevelled seats, 6 cutters & 2 double bushes in set Cutters - Flat in: 11/16, 3/4 mm: 17, 19 - Flat in: 13/16, 1 mm: 20, 25 - Bevelled in: 11/16, 13/16 mm: 17, 20. Display pack. Watch Monument (Parallel Bush) Pro Tap Reseater video on You Tube . Buy MON455 from Amazon Marketplace. N34476 T000309