Wera 022730 Kraftform Plus VDE Stainless Steel Slotted Screwdriver, 3.5 x 100mm

Very nice grip, and the laser groves help it bit the screw better, and the tip size is perfect fit for all thermostats I have used it on. Not to little and not to big PERFECTION

All I can say is that Wera has done their homework. The grip allows for easy removal of corroded, stuck, or tight/torqued fasteners. The laser grooved tip is amazing for gripping into the fastener head and ensuring that contact is not lost. Stainless is the perfect, sanitary option for me, considering I work as a maintenance mechanic at a food production facility. Insulation is strong and bright colored to ensure the driver is never misplaced. The easily read size engravings on top of the driver are perfect. My only personal drawback of the very lightly-colored soft grip inserts on the handle, is that they get dirty instantly while working on equipment. Not an opinion-changer, but if it was black soft grip with red bodies, that would be outstanding. If you need the ultimate in every possible functionality in a manual screwdriver, this is it. I am a Wiha and Wera fanboy, but for my job, these occupy my work tool-bag. Cheers!