Spee-Dee Plastic Pins 60/PkMade of unbreakable tapered plastic Used for Direct Case Core technique Scored for wax and resin retention Leaves no residue after burning Spee Dee Build Up Plastic Pins are made of tapered translucent plastic that allows the pins to burn out without residual traces. These pins are proven to provide superior retention of resin and waxes. Indicated for direct case core technique.