The red-dot laser came without Allan wrenches to make adjustments. I have the wrenches in my gunsmith tool box. The batteries are a pain to insert since it is a 3-stack of small ones; got them in place with a tooth pick. It is very compact and throws a nice red-dot. It will work nicely on one of my home defense pistols. Price/quality value is very good. I also received the reflex sight. Nice to have both red or green and 4 type pattern to use. This one seems to aim much higher than my iron sights on both my Sig 400 and my Kel-tec RDB. I like the sight; lots of pattern and color options. It is well made for limited casual use. It probably would not stand up to combat rigors in that field; but I am just a homey that has a casual infrequent need. Price/quality value is very good.