tri-lobular handle shape for torque and comfort permanent tip identifier prodrivertm screwdriver sets · prodrivertm screwdriver sets are available in sets which feature the most popular sizes to meet most fastening applications · high performance screwdrivers · meets ansi performance standards · ergonomically designed tri-lobular handle · bar molded into handle for greater torque · lacquer coated bar to resist rust · sand blasted and heat treated tip for durability slip-resistant rubber grip sand blasted tip for precision work lacquer coated bar to help resist rust bar molded into handle for greater ...