3/16" diameter, rod-shaped, stainless steel handles use a simple draw-in collet locking mechanism which, when tightened with fingers, grips blade securely. User has maximum control with comfortable, cross-knurled "pencil grip". Ultra-sharp mini-blades are made from ultrasonically cleaned and pre-sterilized stainless steel. 24 blades come neatly packaged in a plastic dispenser box.