The holder is hardened to give it the same strength as a screwdriver. Total Length: 7.5 inches (190 mm); Compatible Replacement Blades: CBL-SG10, CBL-SG50, CBL-SK10, CBL-SK50; Blade Length: 3.9 inches (100 mm); Blade Thickness: 0.02 inches (0.5 mm); Country of Origin: China; Weight: 3.8 oz (97 g).