35 F astening F astening Straight shape for vertical applications Pistol shape for horizontal applications or for better controllability A pplica tions > Materials/ Fasteners > Joint types > Accuracy > T orque/Speed > Duty Scr ews > Shape > Size > Access > Bits T ools > Clutch type > T orque/Speed > Handle type Clutch T ype Ho w to select y our f astening scr ew driv er s? Joint/Screws Combinations The chart beside correlates dif ferent joint and screws combinations.This chart is helpful for initially determining the most likely combination, however on-site testing is recommended to ensure that proper tooling is used for the application. Step 1 Step 2 Step 3 IMP ACT ( R o C k I ng D og) • Good on very soft joints providing high speed rundown. D IR e CT DRI ve • No clutch, directly driven bit • Stall torque regulated to air pressure • Easy to use and maintain • Ergonomic handling (light weight, size...) Po SITI ve CL u TCH • Good for varying torque applications • Operator can force clutch engagement for higher torque • Excellent for wood applications Cu SHI on CL u TCH • H igh speed rundown • T orque output adjusted by the spring tension • Clutch ratchets at preset torque • Easy to use, to adjust and to maintain SH u T -off CL u TCH • Clutch shut-of f the fastening at the preset torque • V arious speeds according to the models • T orque adjustments for accurate tightenings • V arious shapes and starting mode for all types of applications Soft joint (A) and hard joint (B) / metal screw (class 8,8) The initial torque required is very low and grows gradually (so ft joint A) or rapidly (hard joint B) when the screw head begins to slip on the joint. Sheet metal joint / self-threading screw The initial torque for forming the thread is lower than the fna l tightening torque. e namelled sheet metal joint / self -threading screw The initial torque for forming the thread is higher than the fn al tightening torque. Sheet metal joint / self -drilling screw The initial torque for making the hole and forming the thread t ends to increase rapidly when the screw head slips on the joint. Joint with self -locking nut The initial torque required to overcome the friction generated by the plastic insert in the nut tends to increase rapidly when the screw head slips on the joint.