Structural Design

Designed by Kuker, this product features a complex internal framework built from four linked swing arms and six pivot shafts, assembled in a structure inspired by traditional mortise-and-tenon joints. Combined with up to 20 precisely positioned magnets, the mechanism enables dual-sided linked opening with excellent stability, even during rapid movement. This design effectively eliminates wobble, a common issue found in multi-blade opening mechanisms.

Notably, even three-blade opening structures often struggle with instability, making this level of smooth, controlled linkage especially difficult to achieve.

Handling Experience

Thanks to an extra-long opening travel of up to 30mm, each opening and closing action delivers strong, clearly defined tactile feedback. When rotational speed drops below a preset threshold, the blades automatically retract. Skilled users can also manually control the duration of the open state, allowing for customized interaction based on individual play style and preference.

Dimensions

Overall Size: 50 × 32 × 19 mm

Maximum Diameter (Open State): Approximately 80 mm

Materials & Weight

Stainless Steel: Approx. 120 g

Titanium Alloy: Approx. 70 g

Zirconium Alloy: Approx. 100 g

Weight may vary by ±1–2 g due to manufacturing tolerances.