Lisle Quick Quad Pad Spreader — 29100 4-Piston Brake Pad Compressor, Non-Rotating Plates, 2.5" Spread

The Lisle 29100 Quick Quad Pad Spreader is a hand tool that simultaneously compresses disc brake pistons and spreads pads for fast, safe brake pad replacement on single, double and quad piston calipers.

When you need to change brake pads quickly and accurately, the Lisle 29100 provides a guided, non-rotating plate system that pushes pistons back into the caliper housing while holding pads apart—reducing mess, saving time and preventing caliper damage. Its design works whether the caliper is mounted on the vehicle or removed and hanging free, giving technicians and DIYers a dependable option for modern multi-piston brake systems.

How does the Lisle 29100 compress all four pistons at once?

The 29100 uses a multi-point plate that aligns with quad-piston calipers to apply even pressure across piston faces. Instead of rotating plates or single-point screw compressors, this tool forces pistons back uniformly to reduce the risk of uneven piston travel or seal damage.

• Simultaneously compresses up to four pistons on quad piston applications
• Tool plates are fixed and do not rotate for consistent alignment
• Spreads brake pads 2-1/2 inches to clear pad surface for installation
• Patented mechanism (US Patent 6,874,217) for controlled piston retact

Can I use the pad spreader with the caliper still on the vehicle?

Yes—this tool was designed for in-vehicle use as well as when the caliper is removed. Its reach and plate size let you position the spreader over the caliper without disassembly in most common installations.

• Works while caliper is mounted or hanging free
• Plate reach of 1 7/8" (top of plate to outrigger arm) for accessible positioning
• 3 3/4" plate width fits wide piston layouts found on many modern calipers
• Non-rotating plates reduce alignment adjustments during use

What are the physical specs and capacity of the 29100 pad spreader?

The unit combines a sturdy plate layout with a compact reach suited to passenger vehicles and light trucks. Concrete dimensions and spreading capacity make it useful for common brake jobs while remaining easy to store in a toolbox.

• Plate dimensions: 220" thick, 3 3/4" wide (plate thickness and width as specified)
• Reach: 1 7/8" from top of plate to outrigger arm
• Pad spread capability: spreads 2 1/2" to accept new pads and caliper hardware
• Fixed tool plates (do not rotate) for reliable piston engagement

How does using the Lisle Quick Quad make pad replacement easier?

The spreader removes the need to compress pistons with improvised tools or multiple single-point compressors, cutting job time and minimizing the chance of twisting or damaging piston seals. It provides a stable, repeatable method to prepare the caliper for new pads and helps prevent improper seating.

• Reduces time spent on brake pad replacement by compressing multiple pistons at once
• Improves safety by keeping hands clear of pinch points and hot components
• Simplifies installation on tight or awkward caliper assemblies
• Designed for technicians and DIYers seeking consistent results

Who is this for? The Lisle 29100 Quick Quad Pad Spreader is aimed at automotive technicians, independent repair shops and experienced DIYers who service disc brakes on vehicles with single, double or quad piston calipers. If you regularly replace pads on modern multi-piston brake systems and want a faster, more controlled method to retract pistons and spread pads, this tool delivers professional-grade alignment and repeatability while remaining compact enough for a busy shop toolbox.