Sparrows Tension Wheel - Circular Tension Tool hand aid Built around a named dimple

Built around a named dimple profile route

Start on a practice lock and use light tension while learning the movement

The shaped edge

Learn one keyway deeply instead of guessing at every pin

exotic profiles open up new approaches to high-security pinning

Sparrows Tension Wheel - Circular Tension Tool hand aid Built around a named dimpleFree UK delivery over 30 Royal Mail options 30 day easy returns European delivery available Measured tension Sparrows Tension Wheel, circular tension you can measure The Sparrows Tension Wheel is a circular tension tool with graduated markings, so you can actually measure the tension you apply. For single pin picking, that lets you find and repeat the right tension for a lock: rake it first to gauge the pressure, then dial in the same measured tension