Love texture? For years Michael Sherrill has altered his metal ribs to create interesting surfaces. the Drawing Ribs are made out of cutlery grade stainless steel. Think of the Drawing Ribs like different pen nibs or brush tips.The Pebble shape is great for concave surfaces like the inside of a bowl. Choose from 5 different edges:, DP0 – Smoot, DP1 – Organic, DP2 – Wave, DP3 – Tight Angle, DP4 – Tight Wave, Drag. Hatch. Let you imagination have free reign. Have fun discovering every side of these ribs.