The Skew Products Powerbox, No. PBS1420 is a wrench attachment that converts 1/4" air or cordless ratchets to low-profile box wrench output. The head fits most 1/4" power ratchets with necks up to 1" diameter with 1-1/2" minimum length. The Powerbox can be used to get into hard-to-reach areas, including over long-ended bolts, and for powerdriving pass-through type sockets already available in many manual kits on the market. The Powerbox includes a set of low-profile sockets, making it the thinnest power box wrench available.