The studs from Uhlsport are made of solid cast alu, and are made for use on very wet natural grass pitches. they will penetrate the soft ground faster than the nylon/alu duo studs. This will provide you with quicker acceleration on the pitch.
The studs will fit boots across the various brands, including Nike, Puma and Diadora boots in the following models:
adidas World Cup
New Balance Visaro
New Balance Furon
Package contains: 8 x 13 mm 4 x 16 mm
Note: stud key is not included.