Made of strong billet aluminum, the Columbia Tomahawk Smoothing Blades have no plastic parts that will break or crack under the heavy weight of the larger blades. This makes the Tomahawk blades the strongest and most durable smoothing blades on the market today. The blades are replaceable and can be switched out if needed. The Tomahawk blades are compatible with all flat box handles or use the CLTHA (fixed lock adaptor) that fits the Columbia One handles, as well as the Twist Lock Handle.