5-21-393 SURFORM FINE FLAT BLADE 10 Buy Now 5-21-393 SURFORM FINE FLAT BLADE 10 5-21-393 SURFORM FINE FLAT BLADE 10 Buy Now Surform blade for a fine finish Add to Wishlist Features 5-21-398 fits 21-399, 21-102 and 21-104 For fine finishes on hard wood, end grain and some soft metals Support Warranty Unfortunately, the warranty information cannot be retrieved for this specific product. Please review the information about our warranties. Learn More Service We take extensive measures to ensure all our products are made to the very highest standards but on the rare occasion that you need our help & support, we've got you covered. Just get in touch. Support Manual STANLEY manuals are available to help put your tools in operation.