25 Pack, Peg Locks, Simply Clip Over Peg Hook Locking Into Pegboard Holes On Each Side Of The Hook, Can Be Easily Removed By Inserting A Thin Blade Behind 1 Arm & Gently Lifting, Can Be Used With Most Standard Peg Hooks On All Standard 1/4" & 1/8" Pegboard, Dimensions: 4.8" L x 0.5" W x 4" H.