About Products?? Smooth multi-purpose and highest quality putty. The stainless steel flexible blade with a thickness of 0.3 mm smoothes the surface perfectly. Additionally, rounded corners minimize the effect of drawing smoothness. Machined envelopes will actually be ready for primer and paint. The pen will make work easier and faster. Get a professional finish. The plaster knife/pen is: ?? Flexible - The blade is made of stainless steel with a thickness of 0.3mm ?? LIGHTWEIGHT - The plastic construction is approximately 20% lighter than the aluminum version ?? Ergonomics - Handle designed for better working comfort without over-straining wrists, shoulders and shoulders .