https://www.aokbuildingsupply.com/imperial-blades-one-fit-iboa400-1-fast-cut-segment.html
IMPERIAL BLADES ONE FIT IBOA400-1 Fast Cut Segment Blade, 3-1/2 in, High Carbon Steel - A-OK...
IMPERIAL BLADES ONE FIT Fast Cut Segment Blade, 3-1/2 in, Tooth Type: Spear, High Carbon Steel, Applicable Materials: Wood, PVC and Drywall, Black, 2-5/8 in L,