The 8 differences between a deadlift bar vs stiff bar are: Deadlift bars are longer overall than stiff bars; Deadlift bars have a thinner shaft than stiff bars; Deadlift bars have no center knurling, stiff bars do; Deadlift bars have lower tensile strength than stiff bars; Deadlift bars have shorter loadable sleeves than stiff bars. Eaton’s D65 Series Monitoring Relays prevent motors from running at temperatures above approved ratings, and provide protection against phase loss, phase reversal, and phase unbalance due to blown fuses, broken wires or worn contacts. They monitor simultaneous voltage drops/increases, and help to prevent damaged machinery and the injury of.