. . . . . . "[Yo-Yo], owned by Frank Difeo, creates beautiful aluminum yo-yos. Dif-e-Yo is also the inventor of the 'concave' bearing, which has now evolved into the widely used KonKave (KK) bearing. Franks uses a mill to manufacture his yo-yos, unlike almost everyone esle in the industry, who use a lathe. The use of a mill allows Frank to machine interesting and unique designs into the hub area of his creations."@en . . "[Yo-Yo], owned by Frank Difeo, creates beautiful aluminum yo-yos. Dif-e-Yo is also the inventor of the 'concave' bearing, which has now evolved into the widely used KonKave (KK) bearing. Franks uses a mill to manufacture his yo-yos, unlike almost everyone esle in the industry, who use a lathe. The use of a mill allows Frank to machine interesting and unique designs into the hub area of his creations."@en . . . . . . "Dif-e-Yo"@en . . . . .