What is an alternative to a slant board squat?

If you lack a dedicated slant board, the most common gym hack is placing small weight plates (like 2.5 kg or 5 kg plates) under your heels. While this mimics the elevation, it lacks the stability and full-foot support of GymFit Tech wedges, which support the arch and prevent the "teeter-totter" effect.

Weightlifting shoes (lifters) are another premium alternative, offering a built-in solid heel raise of about 20-22mm, though this is often less elevation than the 20-degree stack provided by GymFit Tech. For those looking to replicate the quad isolation without heel elevation, machines like the hack squat or exercises like the "sissy squat" are viable alternatives. However, for a free-weight barbell squat that targets the quads, nothing replicates the mechanics of a wedge as effectively and safely.