40 PCS VALVE SEAT GRINDING STONES  FOR  BLACK & DECKER 9/16" Thread  4 PCS EACH SIZE  HIGH PERFORMANCE  STONES STONE SIZES FOR BLACK & DECKER  1-5/8"  - 8 Pieces  1 1/2" - 8 Pieces 1 3/8"  - 8 Pieces  1 1/4" - 8 Pieces 1 1/8" - 8 Pieces THESE STONES CAN BE DRESSED TO ANY ANGLE   BULK QUERY CONTACT US ! FEEL FREE TO ASK ANY QUESTION THANKS FOR LOOKING !