What is a 6mm Crochet Hook?

What materials are crochet hooks made of and which one is best for

CLOVER-Amour Crochet Hook. The Amour line of hooks feature comfortable easy grips in bright and fun colors. The aluminum hook is optimally shaped for smooth crocheting and the size of the hook is impressed within the elastomer grip for easy identification. The overall length of the hook is 5-1/2 inches; the grip is 4 inches long and the head is 1-1/2 inches long. Each package contains one crochet hook. Imported.

Clover Amour Crochet Hook J

Crochet Hook Sizes & Conversion Chart - Heart Hook Home

Crochet Hook Sizes & Conversion Chart - Heart Hook Home

Double Sided Crochet Hook 6MM

2.0mm-6mm Colorful Crochet Hook Ergonomic Soft Rubber Comfort Grip

Pony Easy Grip 14cm Crochet Hook 9 Peice Set Size 2 to 6mm

US 10/6mm Knitting Needle & Crochet Hook Set Darn Good Yarn Blue

The yarn recommends a 6mm hook (top magic circle) but I wouldn't

Hoooked Bamboo Crochet Hook 6mm 8mm 9mm 10mm 12mm 15mm