What is an Allen wrench with hole in the middle?

They’re called “security screws”.Click to see full answer. Simply so, what is a security allen wrench?This Pin Hex Security Key Wrench is a form of Allen Key to be used with Pin Hex Security Fasteners. Pin Hex fixings are often used in higher torque applications, and find themselves in place of standard socket screws or other standardised fixings.Also, are Hex and Allen keys the same? A hex key, also known as an Allen key or Allen wrench, is a small handheld tool that’s used for for driving bolts and screws with a hexagonal socket. They are available in many different sizes, though they all have the same hexagonal-shaped tip. Simply so, how much does an Allen wrench cost? Compare with similar items This item 10 Pc Allen Wrench Key Set- Metric EKLIND 10111 Hex-L Key allen wrench – 11pc set SAE Inch Sizes .050-1/4 Short series Price $560 $7.23$723 Shipping FREE Shipping on orders over $25 FREE Shipping on orders over $25 Sold By Wideskall Online Amazon.com Item Dimensions — 6 x 4 x 1 in What size is a .050 Allen wrench?050″, 1/16″, 5/64″, 3/32″, 7/64″, 1/8″, 9/64″, 5/32″, 3/16″, 7/32″, 1/4″, 5/16″, and 3/8″. Metric – 0.7mm, 0.9mm, 1.3mm, 1.5mm, 2.0mm, 2.5mm, 3.0mm, 4.0mm, 4.5mm, 5.0mm, 5.5mm, 6.0mm, 7.0mm, 8.0mm, 10.0mm. Great addition to any toolbox includes hard to find sizes.