i used a tension wrench and and a hook pick all in one hand. but for the smaller locks apparently some u can just wrist the pick as ur using it, i need a good grip on both but it can be done one some small locks... aparently
As for some locks being so badly made u can set pins without applying tension. it wouldn't surprise me if the tolerances were off a bit, doubt ude get more than 2/3 pins that way though on the worst made locks, and ude still need 2 turn the plug to open it.