GT Tools RazorScraper™ This thin razor sharp scraper blade tool is one of the most commonly used pinchweld tools. Now available to fit 1/2", 5/8" and 3/4" wide blades made of razor sharp steel. If you are not familiar with the RazorScraper™, let me introduce it to you. The RazorScraper™ has a lightweight aluminum shaft with a quick-change collet that lets you change the blade in seconds.