Knuckle head: 1”. US PRO Tools 6" 1/4 Drive Power Breaker Knuckle Bar 4187. Hand tools. US PRO Tools 1/2" DR X 18" Breaker Bar With Rubber Grip 1579. US PRO 1/2 dr Power Breaker Bar 30" 2094. US PRO Industrial 1/2" Dr 30" Heavy Duty Breaker Bar 4169.
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