Like this High Impact ABS Bone Defense, the finest personal defense products are available from Azan. High tensile strength materials cross with researched and developed design to produce this highly concealable defensive novelty. The exterior is shaped like bones that are linked together, forming around four fingers. Fits adult sizes. Overall Length: 5 Inches. Finger Hole Size: 1.05 Inches. Material: High Impact ABS. Thickness: 12.5mm. Color: Flat Black.