Rough Air Openings: 7"x 7" or 12"x 12"
quick change with all brands of hole saws
Offset hub size of 2-1/4 in
Case is complete with all essential tool accessories
Large head for greater holding power
Drylok White Latex Masonry Waterproofer, 1 Gal. Spring Hinges Rough Air Openings: 7"x 7"Formulated for waterproofing all interior, exterior, above or below grade masonry walls, cinder and concrete blocks, stucco, brick, retaining walls, basements, swimming pools, bird baths, fish ponds, and foundations. Stops water under pressure up to 10 P. S. I. per sq. in. That's greater than a column of water 22' high. Chalky (efflorescence) deposits must be removed by etching the surface. Alkali resistant and may be applied on slightly damp surfaces