CMT 661.021.41 Roundover Bits w/Insert Knives 57/64" x 49/64" (R=5/64") S=1/4" Simpson Strong Tie but this Power-Stud+ SD1 is

but this Power-Stud+ SD1 is specifically designed for performance in cracked concrete as well

Overall Length 3-1/8"

Number of Teeth 24

Each pack contains (1) HSS2-SDS1

CMT 661.021.41 Roundover Bits w/Insert Knives 57/64" x 49/64" (R=5/64") S=1/4" Simpson Strong Tie but this Power-Stud+ SD1 isThe CMT 661. 021. 41 is a 57 64 inch roundover router bit with two replaceable insert knives (R=5 64 inch) and 1 4 inch shank. Features a 4 sided knife insert that can be rotated for 4 usable cutting edges. For rounding over edges on hardwood, softwood, laminates, and chipboard. Bearing guide for accurate edge following. SPECIFICATIONS Order Number 661. 021. 41 Cutting Diameter 57 64" Radius (R) 5 64" Cutting Length (I) 49 64" Shank Diameter 1 4"