Hardened S2 steel blade, chrome-plated long hex ball end and short, flat hex end. Ergonomic polypropylene soft-grip T-handle. Hex ball end for faster, easier insertion and angled driving. Shorter hex end for driving with higher torque. Dedicated set for servicing heating pumps & boilers. Includes 4 x 185mm and 5 x 185mm. Hardened S2 steel blade, chrome-plated long hex ball end and short, flat hex end. Ergonomic polypropylene soft-grip T-handle. Hex ball end for faster, easier insertion and angled driving. Shorter hex end for driving with higher torque. Dedicated set for servicing heating pumps & boilers. Includes 4 x 185mm and 5 x 185mm.