# set(named:skeletalJointName:position:orientation:) Creates and adds a geometric pin to the entity’s skeletal joint, and returns the geometric pin. ``` @discardableResult @MainActor func set(named name: String, skeletalJointName: String, position: SIMD3 = SIMD3(0, 0, 0), orientation: simd_quatf = simd_quatf(ix: 0, iy: 0, iz: 0, r: 1)) -> GeometricPin ``` ## Parameters `name` Name of the `GeometricPin` in the namespace of the owning entity. `skeletalJointName` The name of the skeletal joint in the namespace of the owning entity. `position` The position of the pin, in local space of the joint. `orientation` The orientation of the pin, in local space of the joint. ## Return Value A `GeometricPin`, identifying the newly added reference frame on the [`Entity`](/documentation/RealityKit/Entity). ## Discussion The pin is added to the entity’s [`GeometricPinsComponent`](/documentation/RealityKit/GeometricPinsComponent). --- Copyright © 2026 Apple Inc. All rights reserved. | [Terms of Use](https://www.apple.com/legal/internet-services/terms/site.html) | [Privacy Policy](https://www.apple.com/privacy/privacy-policy)