Jonard PB-3 Pocket Burnisher with 6 Blades, 3/8" Diameter x 4-1/2" Length x 0.0035" Thick A very convenient and handy pocket burnisher^Adjustment of flexible blade-length and rigidity^Is possible by varying depth in chuck^Supplied with replaceable blades stored in pen barrel at the opposite end^Plastic barrel and cap made of sturdy plastic for dielectric work