Rock GT 50 Quad Roller Skates | RollerSkateNation.com。The Sure Grip GT50 Rock SKATES Roller Skates in black are a pair of indoor roller skates designed for men in size 8. Manufactured by Sure-Grip in the United States, these skates feature a durable construction and a sleek design. With a focus on providing a comfortable and secure grip, these roller skates are perfect for both indoor skating and leisurely cruising. Whether you\'re hitting the rink or just want a fun and comfortable skate for indoor use, the Sure Grip GT50 Rock SKATES Roller Skates are a reliable choice for any skater.