About KASFLY Knuckle Duster 444Superconductor

Ultra-thick Limited Edition, made with U.S.-imported 444 superconducting material, featuring industry-leading density and structural uniformity.
Limited “Crown Mark” edition with scarcity certification; supports official website authenticity verification.
Ultra-thick structural design, size: 46.7 × 33.7 × 15 mm.
Sandblasted matte finish; dual-purpose design for self-defense + bottle opener.
Finger hole inner diameter: 22.5–23.5 mm, fits most finger sizes.
Net weight: approx. 80 g.