Malco CHD1 Nut Driver with 1-1/2" Hollow, 1/4" Combined with precision-fit and hardened Malco Hollow Hex Chuck Driver shaft components Offers the ultimate in Nut Driver durability and flexibility 1-1/2-inch (38 MM) Depth, Hollow Nut Driver Nut Driver shown here is sold pre-assembled and packaged as one product, but components are also available separately