An installation tool and fastener is particularly adapted for fastening a top plate to a roof support member and other structural connections. The installation tool comprises a telescopic tool assembly which transfers torque from a power driver tool to a fastener drive coupler. The installation tool has a receiver guide which is configured to concentrically guide a fastener into driver engagement with a fastener coupler. The coupler may have a driver tip with radial projections, a Philips driver tip or a square driver tip. In one embodiment, the installation tool fastener has a head with a maximum head diameter equal to the major thread diameter and a recess for coupling with the drive coupler.

A fastener extractor device for removing seized fasteners and aiding in disengaging the extractor device from said seized fastener afterwards. The extractor device includes a shank body, a drive head, a torque-tool body, a tubular sleeve, an external thread, and an internal thread. The torque-tool body includes a plurality of laterally-bracing sidewalls and an at least one engagement feature. The engagement feature is integrated into a specific sidewall to bite into a sized fastener. The drive head is terminally and concentrically connected to the shank body to receive an external torque tool. The torque-tool body is terminally and concentrically connected to the shank body, opposite the drive head. The tubular sleeve is slidably engaged along the shank body through the internal thread and the external thread to physically disengaged the torque-tool body from a seized fastener.

A screwdriver device including a handle having an elongate channel extending partially therethrough of the handle and an axial blade member having a first distal end and a second distal end being configured and disposed for sliding through the elongate channel of the handle and a locking mechanism configured and disposed for releasably locking the axial blade member at a first operable position relative to the handle wherein the first distal end is exposed and the second distal end is disposed within the handle. The screwdriver device further includes a first tool head disposed on the first distal end of the blade member and a second tool head disposed on the second distal end of the blade member and an ejection mechanism configured and disposed within the handle to constantly urge the axial blade member out of the locking mechanism from the first operable position to a second inoperable position.

A length adjustable connection structure contains: an adjustment assembly, an engagement assembly, and a receiving tube. The receiving tube includes an insertion accommodated, a coupling portion, a groove, a trench, and an elongated slot. The engagement assembly includes a fixing portion, a toothed portion, a fitting portion, a hexagonal hole, and a circular hole. The adjustment assembly includes a connector, a locating orifice, a hexagonal column, and a C-retainer. The hexagonal column of the adjustment assembly is received in the hexagonal hole of the engagement assembly so that the engagement assembly is connected on the hexagonal column, the C-retainer is engaged in the notch of the hexagonal column, and the adjustment assembly and the engagement assembly are accommodated in the receiving tube, hence the toothed portion of the fixing portion is engaged in the groove of the coupling portion, and the fitting portion is fixed in the trench.

A conduit reamer with a lanyard receiver, inner and/or outer cutting blades is provided. The lanyard receiver is located along an axis of the handle near the tool's center of gravity. For example, the lanyard receiver is located between the handle and a bit retainer near the center of gravity. In this orientation, the lanyard receiver prevents tipping of the conduit reamer and retains the bit within the bit retainer when the conduit reamer is dropped. The inner and outer cutting blades include an acute angle that is between 45 and 90 degrees to deburr an end of a conduit.

A multipurpose hand tool may include a body portion, and a first hex socket tool integrally formed with a first side of the body portion. The multipurpose hand tool may include a second hex socket tool integrally formed with a second side of the body portion that opposes the first side of the body portion, and a screwdriver tool integrally formed with a third side of the body portion. The multipurpose hand tool may include a wrench tool integrally formed with a fourth side of the body portion that opposes the third side of the body portion.

A provisional engagement feature for selectively connecting a fastener such as a screw to a driving tool, the fastener incorporating a head with a recess extending therein and a projection contained within the recess for engagement with a corresponding engagement feature and/or selective locking feature of the driving tool.

A method for connecting a screw and a rotary tool in a rotationally fixed manner, wherein the drive surfaces of the driving profiles have a constant inclination relative to their profile axis, which is the same for all drive surfaces of both components. In the component with the outer driving profile, the drive surfaces are all concave or all convex, and in the component with the inner driving profile, the drive surfaces are curved complementary to the drive surfaces of the outer driving profile, in such a way that, in the plugged-together state, the drive surfaces of the two components, viewed in the circumferential direction, come into surface contact/engagement with one another on both sides of the apex of the concave/convex curvature. The driving profiles are designed in such a way that they do not come into contact with each other in the transition regions located between the drive surfaces.

An adapter assembly configured to install a roof rack accessory to a vehicle is provided. The roof rack accessory may include a vehicle attachment assembly having a fastener and a locking mechanism. In particular, the adapter assembly may comprise a wrench, an adapter, and a driving sleeve. The adapter engaging with the wrench includes an adapter body that includes first and second engagement portions and a driving post that engages the fastener of the vehicle attachment assembly. The driving sleeve may be engageable with the adapter, wherein the locking mechanism of the vehicle attachment assembly is engaged with the driving sleeve while the fastener of the vehicle attachment assembly is engaged with the adapter.

A screwdriver comprises a handle including a butt and a shank extending from the handle and including a tip. The butt includes a first indicating element having a shape corresponding to the tip and a plurality of second indicating elements arranged around the first indicating element. Each of the second indicating elements has the shape.