Made from 1/8” thick 6061-T6 hard-rolled tempered aluminum, our hand held groovers are great for smaller jobs and detail work. Both the 4 ” wide and 12″ wide sizes are 8” long, with a replaceable blade 1-1/8” deep with a 3/8” radius. The blade is cut flush with the back edge of the float, allowing full depth grooving against a bulk head or form line.