Hardened and tempered drop forged chrome vanadium steel with nickel chrome plated finish for corrosion resistance. Precisely machined and heat treated. Manufactured to DIN 3110. Includes 1/8" x 3/16", 1/4" x 5/16", 3/8" x 7/16", 1/2" x 9/16", 5/8" x 11/16" and 3/4" x 7/8" Whitworth.

• Chrome vanadium steel
• Satin finish nickel chrome plated for corrosion resistance
• Drop forged to precise tolerances & machined to exceptional accuracy
• Durable, reliable & long service life
• Manufactured to DIN3110