The PTS Enhanced Polymer M-LOK Rail Covers Set are low-profile, two-piece covers that install directly onto most M-LOK aluminum hand guards. This pack of four (2 short & 2 Long) M-LOK covers is non-orientation specific, which allows the user to mount them in any direction desired without affecting function. The unique flat design is compatible with the hand guard that have a wider and flatter profile. The EP dot pattern texture on the cover provides better traction and additional grip. The pack goes with the EP Mini Tool which allows you to un-tab the cover easily. The other side of the tool can be used as a flat head screwdriver.​ Specification:​ Compatibility – M-LOK Mounting Hand Guard Material – High Strength Engineering Plastic Color – Black Weight – Total 9.6g (Long: 3.3g, Short: 1.5g) Product Size – Long: 80(L) x 17(W) x 8(H) mm, Short: 40(L) x 17(W) x 8(H) mm