Self-adjusting keys 4pcs

4 keys replace 12 sizes:

• 18, 19, 20mm & amp; 22/32 & quot ;, 3/4 & quot ;, 25/32 & quot;
• 15, 16, 17mm & amp; 19/32 & quot ;, 5/8 & quot ;, 11/16 & quot;
• 12, 13, 14mm & amp; 15/32 & quot ;, 1/2 & quot ;, 9/16 & rdquo;
• 9, 10, 11mm & amp; 11/32 & quot ;, 3/8 & quot ;, 7/16 & quot;

Turning the key adjusts the key itself. & Nbsp; The harder you turn it, the more the key tightens itself./p>

Easy to use. & nbsp;