Fisherman Mini Lock Aluminum Sleeves , made in Japan, is stronger than any knot.
Japanese Aluminum Sleeves are anodized which prevents corrosion.
Commercial Fishermen have been using aluminum sleeves since the 1980 to crimp their leaders. Crimping with aluminum sleeves for leaders is faster and more secure than knots. Use the proper Crimper Tool specific for crimping these sleeves.
For size S, the diameter of mono line is 50 lbs test and thinner.
For size M, the diameter of mono line is between 60 lbs test and 80 lbs test
For size L, the diameter of mono line is between 90 lbs test and 140 lbs test
for size LL, the diameter of mono line is between 150 lbs test and 250 lbs test