At Strapworks we carry Light Duty and Square Cornered Nickle Plated Trigger Snaps. The 3/4 inch comes in squared corner. Sizes include 1/2 inch Light Duty, 3/4 inch Light Duty, 3/4 inch Squared, 1 inch Light Duty, 1 inch Squared, 1 inch Light Duty Anodized Black, and a 1 1/2 inch Squared.
For more information, please click on the RED technical specs tab above.
These are certainly our choice for heavy duty leash hardware. However, some of the trigger snaps are light duty and not recommended for leash hardware. The release is pretty exaggerated. Most prefer these over the bolt snaps because it is harder for the trigger snaps "release" to catch on something and open.