MARSHALLTOWN The Premier Line 710SD 16-Inch by 4-Inch Notched Trowel with Curved DuraSoft Handle For resilient flooring and carpet Aluminum alloy mounting riveted to a hard tempered steel blad Blade size is 16 X 4" Resilient DuraSoft handle provides a soft feel, reduces fatigue, and offers excellent durability Square Notch Size 1/4 X 1/4 X 1/4"