The "Danger" collar from BESTIA CUSTOM DOG GEAR® features two spike models: smaller 12 mm spikes and bigger 2 cm spikes in the middle row, with screw-back spikes totaling 51 for size L. The base layer is 4 mm thick belt leather described as very strong and durable, while the inside layer includes our Patented Soft Cushion made of Orthopedic Foam. The collar is made with 100% real pig or lamb leather. Available in a wide range of sizes and cushion colors, the collar has a total width of 6.3 cm (2.5 inches). All metal parts are nickel-plated steel wire. Buckle and D-ring measure 35 mm (1.4 inches) for sizes M–XL and 50 mm (2 inches) for XXL. Size chart: M fits neck 42.5–50 cm (16.7–19.7 in); L 50–57.5 cm (19.7–22.6 in); XL 57.5–65 cm (22.6–25.6 in); XXL 65–75 cm (25.6–29.6 in). Primary color: Black. It fits large breeds such as Pitbull, Cane Corso, American Bulldog, Bulldog, Presa Canario, Rottweiler, Boxer, Amstaff, Staffordshire Terrier, Bullmastiff, and more. Made in Europe; handmade quality. 📋 Product summary: Two spike models: smaller 12 mm spikes and bigger 2 cm middle-row spikes; screw-back spikes; 51 spikes for size L Base layer: 4 mm thick belt leather; 100% genuine pig or lamb leather; soft padded; very strong and durable Inside layer: Patented Soft Cushion made of Orthopedic Foam Total width: 6.3 cm (2.5 inches) Hardware: nickel-plated metal parts (steel wire); buckle and D-ring 35 mm for M–XL; 50 mm for XXL Sizes/neck ranges: M 42.5–50 cm; L 50–57.5 cm; XL 57.5–65 cm; XXL 65–75 cm Primary color: Black; fits large breeds (e.g., Pitbull, Cane Corso, American Bulldog, Bulldog, Presa Canario, Rottweiler, Boxer, Amstaff, Staffordshire Terrier, Bullmastiff); Made in Europe