28394 is a 7 piece, slotted, Phillips, square, insulated slimline ultra driver blade set. It features an ergonomic cushion grip for comfort, control, and maximum torque. The dual durometer construction delivers long-lasting durability, and the handle is directly molded to the blade holder for a permanent bond. Our innovative pop-up design puts more driver configurations in one compact tool by storing up to 6 SlimLine VDE-certified insulated blades. Simply engage the push-button release to access the blades and rotate the compartment for a quick and easy selection of user required tip profile. The SlimLine VDE-certified insulated blades consist of premium quality tool steel for strength and durability, it has a black oxide finish for corrosion protection, and feature exact-fit precision machined tips for reduced cam-out. Every single Wiha insulated tool is individually tested to 10,000VAC and rated to 1,000VAC for safety and peace of mind in energized applications.