Through Authenticate 
"Simply slide and selec froma weight."
Unlike its predecessor the SD-1 with a bulky body and limited weight 0ions,
the SD-2 is engineered to be slimmer with more weight options. The 15 possible
weight selections are the most on the market.
The plates are also coated to reduce the risk of injury or floor damage if the dumbbells
are dropped accidentally. Simply pull and slide our patent protected "Slide Tech"
system to selec desired workout weight.
