Kamasa 56094 Torque Screwdriver Set for Bicycles

I was not too hopeful that this would not be a bad purchase but now it has arrived and I have had a chance to use it I am delighted, it is excellent.The description put me off as I wanted it to set the torque of screws on my very expensive rifles and telescopic sights, not bicycles! It was not too obvious how it worked and I expected to have to turn it and read the gauge at the same time. I was wrong.It arrived in a good quality heavy duty plastic storage case and badged Kamasa which is a brand I am familiar with and like.In use, simply use the 6mm adapter socket and T-bar to wind the adjuster recessed in the end of the tool to the correct setting as displayed clearly in the side window. Once set, it will hold that setting. Now use it like a normal screwdriver and at the pre-set torque it will click loudly and release. It claims plus/minus 10% accuracy which is more than accurate enough. Rifle scopes tend to be torqued to around 2Nm range and Stock screws 7-8Nm so this tool covers all you might require for a gun (do check, all guns are different).For info: Converting Nm to inch/lbs 1Nm=8.85, 2Nm=17.7, 4Nm=35.4 and 8Nm=70.81 inch lbs

I don't normally write reviews, but I will make an exception on this occasion! I have been using this torque driver for the last couple of weeks, as I bought this for scope rings, stock screws on an air rifle etc...what can I say, just blown away by the quality and ease of use (for the money I paid). The click when you reach the desired torque is positive, good grip on the handle, the case it comes in is very handy. 1-8NM will cover most peoples needs, certainly what you can achieve with a screwdriver type handle - perfect for air rifles/scope mounting accessories etc. You can pay 3 times this amount for a driver of lesser quality! If you're looking for an excellent quality torque driver at an affordable price, then look no further - you cannot go wrong with this one :)

I was pretty impressed when I first opened the package, both the box and the tools appeared to be good quality. Considering it was one of the cheapest torque screwdrivers on Amazon, I was not expecting much.There were no instructions, but I quickly worked out that the chrome socket and bar was to wind up the internal tension spring to produce the torque setting desired (second pic). Those settings were marked on the dial with numbers representing Nm, and as the spring was tensioned there is a little red line that moves up the scale. It is easy to get a fairly accurate setting from that.With the help of Google, I converted my in/lb settings to Nm and started with the lowest at 2Nm. It was a fairly small hex head and I was cautious, but there was a reassuringly solid click when I reached my target setting. I repeated this for all the bolts and moved on to a larger bold requiring 3.4Nm. A lot harder to twist the screwdriver, but this was reached without hassle too. I moved onto my other scopes and finally had one that required a flat headed screwdriver (none supplied or listed, but they are in the photo as being part of the set - they are a standard size, so I borrowed on from another screwdriver set I have). This required 4.5Nm and was very hard to achieve, and barely managed.I believe a tool would be required to achieve torques above 5Nm unless you have a very good grip and arm muscles to match (not me!) the tool would be like an 18mm hex key inserted in the end (third pic). Though again, without instructions I have no idea if the plastic case was designed to take that sort of mechanical effort.So in summary, excellent tool for the money. Instructions should have been provided. Correct picture on the advert would be helpful, and a few more heads, particularly flat blades would be useful for those that don't have other sets. But not really a game changer. It did what I wanted very well and very easily, and probably accurate enough for my needs.

This is about a third the price of the brand name certificated devices yet it is solidly made. This has been pointed out in other reviews, but it is also accurate, or rather predictably inaccurate. I calibrated it and found that it consistently read 0.3Nm high across the scale which means it is easy to compensate for and that they have got the right spring which might mean that all devices of this model could be similarly accurate or off by a constant amount. If you want to calibrate yours then a M10 bolt fits the nut recess on the bottom which with two locking nuts can be put in a vice and a suitcase weigh scale (calibrated against a known weight) applied to a lever (eg a socket wrench) of known length to give you Nm. Lever length x scale reading x 9.8 = Nm. you need to ensure you pull perpendicular to the lever and horizontally. It is not too hard to measure +/-0.1 Nm but you do have to play around with sockets to convert from the standard hex ending to something you can attach to your lever. The bolt in the base makes it all much easier as otherwise it is hard to hold.

Bought this to tighten brake lever fitting on my bike, as it went down to low torque settings. Did the job perfectly. Handy bit of kit, that’s well made and nicely packaged in its own case.

A Kamasa branded torque screwdriver with adequate accuracy for its range. A torque scatter of +/- 10% is considered good.The one I received is marked 1-8 - not Roman numerals as shown in the picture. It came in a handy case with instructions on the bottom. It's easy to set and has good repeatability.I bought it for two purposes. The first is for car panel screws. It's so easy to overtighten these - especially the undertray screws where I can't get a feel for how tight they are. The second is for computer screws.

Well made, easy to adjust and seems accurate, would recommend

Not acurate enough to consider using.