Expandet nylon anchors are expensive, so I only use them when I'm drilling a hole the cheaper anchor won't catch (twist in place) or if the screw I want to use doesn't exactly fit a cheap anchor.The shape of the anchor prevents it from twisting in the drill hole.Anchors come in 4 cubes of 25.Each cube is held together with two-hole plastic tape to aid in locating of the drill bit and the correct size screw (see pictures). These anchors are also easy to cut to the desired length. The green Expandet anchors are for a 7mm or 1/4" hole and for marked a #10 screw (4.5mm to 5.5mm) There is no mention on the box or packaging of where these anchors are made Product only 4 stars because of the price.