Groove 'n Turn toolholders, part of the Thinbit (www.thinbit.com) line of cutting tools from Kaiser Tool Co., hold grooving and face-grooving inserts in sizes from 0.004 in. to 0.155 in. on conventional, Swiss and CNC machines. They are available with square shank sizes 0.3125 in. through 1.250 in. with straight and 90° presentations. The company will trade older S-series holders for Groove 'N Turn toolholders.