Sir, This is flap grafting but time taking and not good one as no part of wood is properly secured because it does not make any strong contact with the wood of stock so only cleft and veneer graft in mango remains preferred technique of commercial propagation please. Whip and tongue grafting can also be said good one but not gives much success because it is bit problematic to prepare tongues in both scion and stock of mango please. 👌👍🙏🙏