Facom Compact Adapter-1/4>3/8" (D.169RJ) - great for use with ratchets and sockets in compact spaces. 1/4>3/8 (for use of 3/8" drive sockets with 1/4" drive ratchets)...reduction of approx 10mm in height vs R.232 adapter. The knurled adapter allow for excellent finger grip when using sockets without a ratchet or driver. Also available in a 3pc set.