UPTODATETOOLS 6 PCS IMPACT DRIVER DRILL SOCKET ADAPTER SET (65mm-150mm): 1/4” 3/8” 1/2” PRODUCT DIMENSION: 1/4 * 1/4 -- 1/4 " shank can be converted to 6.35mm square head 3/8 * 1/4 -- 1/4 " shank can be converted to 9.53mm square head 1/2 * 1/4 -- 1/4 " shank can be converted to 12.7mm square head Color: Gray PRODUCT FEATURES: ? [DURABILITY]- This 6 pcs impact driver bit socket adapter set is made of hardened & treated Chrome-Vanadium steel for superior strength & durability! ? [ACCESS TO TIGHT SPACES]- Package includes 3 pcs SUPER LONG drill bit extension (150mm) and 3 pcs 65mm-73mm socket adapters for your various needs. The impact grade drivers socket adapters provide additional length to confined and narrow space, a great impact drive accessory tool kit for hard-reaching area or confined spaces. ? [3 HEAD SIZES]- This drill bit extension set includes 3 most commonly-used bit sizes: 1/4”, 3/8” and 1/2”; ?[APPLICATION]- With universal 1/4 inch hex shank, the impact grade socket adapters are widely compatible with hexagonal tools. They are useful for automotive mechanic vehicle repairs, technicians, handyman & DIY lovers to use with sockets on hardware tire nuts, lag bolts, hex head cap screws at home, workshop factory or construction site.