Autoblog and Yahoo may earn commission from links in this article.Most pen flashlights measure under 6 inches and weigh less than 1 pound, which might make them seem relatively inconsequential compared to many other tools mechanics depend on. Yet, professional auto technicians and DIY gearheads both agree that these compact yet powerful flashlights are among their favorite automotive tools. These lights allow them to quickly illuminate engine bays and other darkened areas of vehicles that would otherwise be almost impossible to see.If you routinely work on cars, either for work or pleasure, and often struggle to get a good look at what's going on with them because of a lack of lighting, the Milwaukee Pen Flashlight can change this in an instant. You can put one into your pocket now for almost 25% off at Amazon. The flashlight typically costs $26, but it has been marked down to just $20.Milwaukee Pen Flashlight, $20 (was $26) at AmazonMilwaukee Pen Flashlight, $20 (was $26) at AmazonCheck PriceMeasuring just under 5.5 inches and weighing about 0.1 pounds, this pen flashlight is small enough to fit in the average shirt pocket, making it extremely easy to carry and access at all times. It's also much brighter than you might imagine, as it can deliver 100 lumens and throw light over 130 feet. It features a corrosion-resistant aluminum body as well, and, maybe best of all, it boasts a rubber bite zone at the end that you can use to manipulate it with your mouth while tackling tasks that require two hands.AdvertisementAdvertisement"This little thing is a monster for its size," one reviewer wrote. "It's very bright. I have other mechanics asking me to borrow it constantly!" Another shopper chimed in, writing, "It's compact and bright. I love this flashlight and use it every day as a mechanic."Rovyvon Aurora A33 Pen Flashlight, $19 (was $27) at AmazonRovyvon Aurora A33 Pen Flashlight, $19 (was $27) at AmazonCheck PriceThe Milwaukee Pen Flashlight is a great lighting option for mechanics available at a great price, but it isn't the only one on sale at Amazon right now. The Rovyvon Aurora A33 Pen Flashlight is another excellent choice. It's actually a little brighter than the Milwaukee pen flashlight, as it can deliver 200 lumens while also throwing light over 130 feet.Additionally, this pen flashlight comes with a rechargeable battery rather than relying on AAA batteries, like the Milwaukee light. Some mechanics say this is ultimately the deciding factor when buying it. "I use it daily as a mechanic and love that I don't have to change its batteries every week," one wrote.Related: DeWalt's 'Impressive' LED Flashlight Is on Sale for 62% Off at AmazonAdvertisementAdvertisementThe Rovyvon Aurora A33 Pen Flashlight usually sells for $27, but it's on sale for just $19 at Amazon right now, 30% in savings.Deals We're LovingWorkpro Pen Flashlight, $16 (was $19) at AmazonWuben Pen Flashlight, $20 (was $25) at AmazonLepro Pen Flashlights, $11 (was $14) at AmazonThe Milwaukee Pen Flashlight is 24% off at Amazon. Make sure you always have one in your pocket by purchasing it today.This story was originally published by Autoblog on Jul 2, 2026, where it first appeared in the Deals section. Add Autoblog as a Preferred Source by clicking here.