3-1/2" Spanner with sure grip & belt ring: Solid spanner wrenches are available to fit up to 6" hose couplings. All models will fit into our Model SW-MBA mounting bracket. Spanner wrenches are available with belt ring and/or Sure-Grip coating. The optional "Sure-Grip" coasting provides a durable non-slip surface that won't get away from you. The brigh color makes it easy to see.Built in gas cock shut-off is standard. Solid spanners are 12-1/2" long.