Description: Rated current is 30A; thickness of clip is 0.5mm or so; opening range of clip is 10mm These well-made 4 pcs crocodile alligator clip are made of environment friendly materials With thicken protective insulation sleeve; it will be safer and more convenient for operating Mainly used in electric circuit, automotive, and battery-powered projects; will a best smart choice for electric engineer and electric DIY lover Material: Metal, Plastic Color: Black & Black Size Chart: Size: approx. 45mm/1.77inch Size(cover): approx. 4.7*?1.0cm Package Includes: 2 Pairs Metal Alligator Clips