They are specialized key blanks cut to represent every possible "space" (position) and "depth" (cut level) for Yale Y1 locks

2007-Jeep-Commander

How Progression is Accomplished to create a Key Bitting Array

Make it affordable—at $49

2-Sided Rotating Key Display by Ilco - 84 Hooks 1999-Pontiac-Firebird They are specialized key blanks2 Sided Rotating Key Display by Ilco 84 Hooks Merchandise up to 84 different key blanks on this double sided rotating display. Perfectly sized for displaying carded keys as well. Includes header and rotating base. Specs: Dimensions: 15 W x 32 H x 15 D (393. 7 mm x 825. 5 mm x 393. 7 mm) Weight: 16 lbs. (7. 3 kg) without keys Availability 20 days