Woodruff Keyseat Cutters Inch sizes 1/2" 5/8" 3/4" 7/8" 1" 1.1/4 1.3/8" 1.1/2" milling cutters for BS 204 304 404 305 405 505 406 506 606 507 607 707 807 BS 608 708 808 1008 609 709 809 1009 cutter BS 610 710 810 1010 1210 BS 811 1011 1211 812 1012 1212 Used for milling seatings keyways for producing slots for Woodruff Keys to BSS122 Right hand with threaded shank HSS