Strap adjusters allow you to adjust the length of a strap to fit the person carrying the purse or bag. They are particularly useful for backpacks and slings since the adjusters allow the user to regularly and quickly adjust the straps to remove the bag from the back or tighten the load. HAR1-STA-B-TWO In this package you get two (2) black plastic sliders. (Note plastic hardware is packaged in a bag with a hang tag, not in plastic cases like ByAnnie's metal hardware.) Our plastic hardware is durable and solid, yet lightweight. It is great for functional projects that will get regular use. Every 1-inch hardware piece has a 1-inch opening for attaching strapping. We recommend covering the strapping with a coordinating fabric in order to make a truly custom look for your project. All relevant ByAnnie.com patterns include instructions for how to do this and use your fabric efficiently.