Caliper guide bolts use fastener heads that a normal socket set does not carry, and the pattern changes by manufacturer. Ten-point, seven-point, eleven-point, spline and long hex all appear on this leaf, and the pattern has to be read off the vehicle rather than guessed from the size.
The fitments held here name the vehicles they suit: 10mm and 15mm ten-point for VAG and Porsche, 14mm seven-point for Audi Q7 and S4, 8mm eleven-point for Knorr-Bremse, plus 20mm ten-point, H9 and M14 spline. A 7mm hex bit at 100mm long and an angled long-reach hex cover the recessed ones. Angled long-reach hex bits cover the guide bolts set behind a hub or a shield.
Piston work is the second job on the leaf. A spreader pushes both pistons back evenly to accept new pads, and a piston cube on 3/8 inch drive turns a piston that has to be wound rather than pushed. Drum work brings its own tools, with shoe spring pliers at 300mm and shoe fitting tools. Caliper support hooks hang the caliper clear rather than leaving it on the hose while pads are changed.
Measurement closes the job out, since pads and discs are replaced against a wear figure rather than by appearance. A digital brake disc caliper at 100mm reads disc thickness where a normal caliper cannot reach past the lip. Breaker bars at 450mm handle seized fasteners. For an unfamiliar caliper bolt head, a photo to 07754288583 on WhatsApp identifies the pattern faster than measuring it.