Specification Brand : Drip Depot ExternallyAssignedProductIdentifier1 : 0818564017712 ExternallyAssignedProductIdentifier2 : 818564017712 ItemName : 5/8" Drip Tape Take-Off x 3.6mm Barb Adapter - Pack of 5 ItemPackageQuantity : 5 ItemShape : Round ItemTypeKeyword : automatic-lawn-irrigation-tubing Manufacturer : Drip Depot NumberOfItems : 5 PartNumber : 5101 ProductDescription : A very economical Drip Tape Barbed Take-Off Adapter. Item has the smaller 3.6mm barb for shorter tape runs and smaller mainlines. Compatible with most brands of 5/8" thin-wall drip irrigation tape.To Use: Insert the small barb into a hole punched into the 1/2" or larger poly tubing. Then just slip the drip tape over the large barb and twist the locking ring out over the tape to secure. Any quality 1/4" punch tool will work. It does take a bit of effort to insert the fittings into the punched hole. If the poly tubing is cooler, it is a little stiffer, and insertion is easier than when poly is warm or hot from the sun.