Wera 9 Piece Imperial Hex Key Set Wera 9 Piece 950/9 SAE Hex Key set is designed with Hex-Plus technology to extend the life of Hexagon sockets. Wera Hex-Plus technology prevents the rounding of screws caused by sharp edges of conventional tools gradually wearing the screw head. Hex-Plus tools provide more surface contact transferring up to 20% more torque. Finger protection rubber sleeve with easy-to-grip material ensures comfortable and safe working. Blacklaser hardened blades provide excellent surface and corrosion protection for a long service life. Features ballpoint on long-arm of L-key to insert the tool quickly into screw and work at an angle in confined spaces. Wera's non-wearing material ensures L-keys stay fixed even after frequent removal. Handy fold-over clip with sliding switch opens easy for quick insert and removal of tools. Each L-key is laser engraved with the size of each tool for easy location.