This "6-1/4" bi-metal hole saw, 158mm HSS drill bit and 1.5" deep HSS drill bit, painted green, cuts wood, but the kerf isn't wide enough for it to fit in. With a depth of over 1/4" it tucks in enough to slow down a powerful angle drill. 2x frames need to be cut on both sides or the center piece will be knocked out. Perfect size for a 6" round channel spaced 1/8" apart. Additional pilot drill bits were helpful. Used one in a cordless drill to drill a pilot hole for cutting from the opposite side.