IGB1006: Features: -Adds grip to ratchet extensions.-Allows technician to finger tighten nuts and bolts.-Small, lightweight and inexpensive.-Fits most extensions in 1/4 sizes.-Easy to install or remove if needed The Bulldog Ratchet Extension Grip Collars are a must for all toolboxes. The Bulldog 1/4 size has 4 collars in each package..-''...