Pro-Grade 13pc Tamper Proof Torx Star Bit Set T-4 To T-40 - Taiwan by Pro Tools<div style="text-align: left;"><strong>[Product Information]</strong><br><ul><li>Full size-range of TORX (aka star) bits in tamper-proof/security configuration (hole in center)</li><li>Hardened &amp; tempered CrV steel for durability， resists twisting， cam-out; pro-quality， made in Taiwan</li><li>Precision-machined tips for superior fit and functionality; includes PVC holster to keep organized</li><li>1" length x 1/4" hex shank to fit drill chucks， impact drivers， driver handles &amp; bit holders</li><li>13 most-used sizes: T-4， T-5， T-6， T-7， T-8， T-9， T-10， T-15， T-20， T-25， T-30 &amp; T-40</li></ul></div><img src="http://ecx.images-amazon.com/images/I/41aaYhLqBVL.jpg" noproxy>