The Grey Pneumatic 4040RTW is a 1" drive by 1-1/4" 6-point standard-length thin-wall impact socket. It is specifically designed to handle high-torque tasks while providing access to tight spaces where a standard thick-wall impact socket will not fit. Key Specifications & Features Drive Size: 1" square drive. Socket Size: 1-1/4" fractional SAE. Socket Profile: 6-point hex to prevent the rounding of heavy-duty fasteners. Wall Type: Thin-wall (RTW), which reduces the outer diameter of the socket for maximum clearance around narrow wheel wells and recessed industrial bolts. Material: Forged from high-grade Chrome-Molybdenum (Cr-Mo) alloy steel, ensuring excellent strength-to-weight ratio and resilience under continuous pneumatic impacts. Durability: Exacting heat treatment balances hardness and flexibility to prevent shattering under extreme torque.