Material -- The car belt adjuster is made of 45# steel, which is smooth and burr-free, sturdy and durable, the black surface is coated with electrophoresis to prevent corroding and rusting. E Shape -- Car metal E shape locking buckle total length is 7cm/2.75inch, hole length is 5cm/1.99inch, thick is 2.5mm/0.1inch, it can be through the car belt width within 5cm and can jam two straps. Driving is much more enjoyable -- The seatbelt clip do the job of holding the seat belt at a good angle to solve the problem of getting chaffed across the neck from your seatbelt. Adaptability -- Very suitable for larger and shorter people. Eliminate the discomfort of the seat belt on the neck, face and shoulder area. The metal will not break like a fragile plastic regulator. Smooth edges keep you comfortable. Application -- Prevent the car seat belt from retracting, bring you a more comfortable driving trip. The car belt retainer is suitable for most cars, pls check size before you purchase. Material--45# steel Color--black Size--Total length 7cm, hole length 5cm.Items from Sheng Xinshun's shopProducts from KJ's store