"Innovation with imagination" - Slogan MonkeyfingeR Design (MFD for short) is a manufacturer of high-end metal return tops based in Canada. It was first started in 2010 by Ray Smith. The company is best known for producing return tops that feature bold body profiles and exotic multi-colored finishes, designed by players for players. It also produces and sells its own flowable silicone product specifically for return tops, called Monkey Snot, and comes in ten different colors.