Tile notch trowel 1/4 x 3/16 V-notch

What tile would you use a 1/4 x 3/16 inch V-notch trowel for? Shower waterproofing membranes? Uncoupling membranes? Ditra? Penny round tiles? Hexagon tiles? See this trowel on Amazon: 1/4 x 3/16 inch V-notch trowel: amzn.to/3tYv5r1 As an Amazon Associate I earn from qualifying purchases.