The Smith & Wesson Model 1 is a push pin double lock design. These cuffs open 25% larger for big wrists and close 25% smaller for thin wrists. Two standard keys supplied.
Specifications:

Type	Handcuff
Model or Style	Universal
Color	Nickel
Size	Adjustable
Material	Steel
Heating Area
Mount
Battery
Dimensions
Model Fit
Run Time
Volt
Function	Restraint
Gun Type
BTU