These Crosby Products links, also know as a Hammerlock, are strong and versatile. 

Made in USA from Forged alloy steel, Quenched and Tempered.

• Suitable for use with both Grade 80 and Grade 100 chain
• Individually proof-tested at 2-1/2 times Working Load Limit with certification
• Locking system that provides for simple assembly and disassembly...no special tools needed
• 25% stronger than Grade 80
• Meets ASTM A-952-96 standards for Grade 100 chain fittings
• Fatigue rated
• Made in USA

Grade: 100
Size: 1/4" to 5/8"

Working Load Limit:

• 1/4" (9/32") 4,300 LBS
• 5/16" 5,700 LBS
• 3/8" 8,800 LBS
• 1/2" 15,000 LBS
• 5/8" 22,600 LBS

When using a connecting link make sure to match it's size with the chains.

Safety Warning: Read and understand specifications, instructions, and safety warnings before using products. All products should never be used beyond their certified load ratings.