Purdy 144900230 Premium Carbide Scraper With Hammerhead & Removable Knob. Purdy Premium and Contractor surface preparation tools were engineered with input and direction from professional painters and manufactured with the same level of quality you have come to expect from Purdy. Over 96% of professionals rated these tools on blade performance, comfort, blade finish, blade flex and durability as good as or better than their own tools.