1、Hexagon socket length: 3.15 in (80mm), Hole depth: 1.3 in (34mm). 2、1/4" handle socket wrench set Sizes: 5.5mm, 6mm, 7mm, 8mm, 9mm, 10mm, 11mm, 12mm, 13mm, 14mm, 15mm, 16mm, 17mm, 18mm, 19mm, 15 different size to meet your various needs. 3、Material: Hex drive socket set made of heat-treated chrome vanadium(CR-V) steel, extra high hardness, good abrasion resistance, durable and long service life. 4、The sleeve has a depth of 1.3 inches to accommodate extra bolts for longer shafts. 5、Applicable for installing in those hexagon tools, such as pneumatic screwdriver, electric screwdriver, pneumatic drill, electric drill, pistol drill, manual screwdriver, and more. Widely used in household DIY, auto parts, woodworking, professional machine repairing and more.