The Rotring Tikky Mechanical Pencil is a professional tool that's popular with artists, designers and architects. The ergonomic wave-form grip area makes it comfortable to hold and easy to control, whether you're drawing or writing, while the hi-polymer leads are durable and help keep the lead-support tip clean. The Rotring Tikky Mechanical Pencil comes in a range of lead widths and colours; this wallet contains three black pencils with a range of lead widths to meet all your sketching and technical drawing needs: 0.35mm, 0.5mm and 0.7mm.