Review on 🔧 Russell 639630 Speed Bleeder for Domestic Vehicles by John Martin

They have a larger screw head, 12mm instead of 10mm for the standard brake bleeder. For the front calipers, you'll need a regular 12mm open-end wrench to turn them when the 12mm head hits the hard line of the caliper near the bleed hole, as will a 12mm wrench with a flare nut . It's fine as long as the OEM units aren't snapped into the front as the power socket is the best option for getting the old ones out. Use a Liquid Wench Penetrant before attempting to remove old blocks.