AL-4 Anchor Links from Peak Design allow you to quickly and securely attach and detach most standard camera straps from your camera. The AL-4 anchors will indicate when it is time to replace your anchors. The outside sheath of the anchor is black the middle sheath is yellow and the inner sheath is red. When you start seeing yellow its time to replace your anchors. Two Links for the strap are included as are four Anchors that attach to your camera. Photographers will appreciate the thicker cord that distinguish the AL-4 from earlier versions. The AL-4 is compatible with Peak Design tripod plates. Super strong Version 4 Dyneema-corded Anchors can withstand over 200 lbs 90 kg making Anchor Links safe for use with the largest of professional cameras Low-profile and unobtrusive The lightweight Delrin Anchor disks are smaller than a penny and will never scratch your camera body. Works with any SLR compatible with any SLR camera including large full-frame bodies and cameras with battery grips. Compatible with PD gear works with Capture Camera Clip and interchangeable with all PD camera straps.