Key Features: Attach speaker grill to cabinet Fits 7/16" dia cabinet holes Male and female pieces press-fit into hole Pack of 12 pairs Ball and socket type grill guides for attaching speaker grill to cabinet. To use, simply drill the appropriate size holes in cabinet and grill frame. Both the male and female portions press-fit into their appropriate holes. Item Specifics 12 - Grill guides pairs Fits cabinet holes measuring 7/16" diameter by 3/8" deep and grill frame holes measuring 3/8" diameter by 1/4" deep