Locks are insulated to protect workers from shocks when the key is inserted. They're also six pin and precision machined for more unique key cuts and better tamper resistance. Locks are compact and lightweight, plus they resist impact, temperature, chemicals, and corrosion. Their non-conductive, non-sparking bodies feature ribbed designs for easy gripping and handling too. They measure 1 3/4"H x 1 1/2"W x 13/16"D (bodies) with 1 1/2" x 1/4" shackles and come with one key.