RotoZip roto-zip 1/8 guide point drywall router bits for cutout tools

Edge Treatment & Grooving Bits by RotoZip. Details:Rotozip 1/8″ Guide Point Bits (Bulk Box contains 2 packages of 8 bits ea.) Cuts drywall with a guidepoint end that follows around, instead of cutting through, an obstacle like an outlet box. 1/8″ diameter 16 bits per pack.