#5 Spline Impact Adaptors, 1 in (male square) drive, 3 21/32 in
Designed for superior performance permitting easy interchange of tools from one drive size to another|Oiled black oxide finish|Forged and machined for best fit and unyielding strength|Precision heat-treated and tempered for optimal hardness, ductility and durability|Easy to read stamp pattern in order to quickly determine opening size