The Proskit SD-9857M provides two separate bit sets — 24 pieces of Ø6.35 mm CR-V bits for general electronics and electrical work, and 30 pieces of Ø4 mm CR-V bits for precision work on phones, game consoles, wearables, laptops and small appliances. The swivel cap allows single-finger rotation for fast, controlled driving.

A 1/4" to 4.0 mm adaptor bridges both bit sizes using the same handle, and the adjustable 3-length extension bar reaches fasteners in deep or awkward locations. A durable storage box keeps all 57 pieces organised.

Key Features

• 57 pieces total: 24 × Ø6.35 mm CR-V bits and 30 × Ø4 mm CR-V bits, plus extension bar and adaptor
• Swivel cap for smooth single-finger rotation during fast driving
• Non-slip TPR handle for secure grip
• Adjustable 3-length extension bar for deep or restricted access
• 1/4" to 4.0 mm adaptor for compatibility with both bit groups
• Durable storage box for all pieces

Product Benefits

• Two bit diameter groups in one set cover both standard electronics (Ø6.35 mm) and precision phone/tablet work (Ø4 mm) without needing a second kit
• The swivel cap reduces hand fatigue when driving multiple fasteners quickly
• Non-slip TPR handle maintains grip even when hands are greasy or the work area is tight
• The adjustable extension bar adds reach without requiring a separate extension accessory
• CR-V (Chrome Vanadium) steel bits resist wear and deformation under torque

Technical Specifications

• Model: Proskit SD-9857M
• Total pieces: 57
• Handle: Non-slip TPR with swivel cap
• Adaptor: 1/4" to 4.0 mm
• Extension bar: Adjustable, 3 lengths
• 24 pcs Ø6.35 mm CR-V bits:
• Slotted: 4.0, 5.0, 6.0, 7.0 mm
• Phillips: PH0, PH1, PH2×2, PH3
• Hex: 3.0, 4.0, 5.0, 6.0 mm
• Square: S1, S2
• Pozidriv: PZ0, PZ1, PZ2, PZ3
• Spanner: 2.6 mm
• Torx: T25, T27, T30, T40
• 30 pcs Ø4 mm CR-V bits:
• Slotted: 1.5, 2.0, 2.5, 3.0, 3.5, 4.0 mm
• Phillips: PH00, PH0, PH1, PH2
• Hex: 0.9, 1.3, 1.5, 2.0, 2.5, 3.0 mm
• Torx: T4, T5, T6, T7, T8, T10, T15, T20
• Needle type: 1.0 mm / Triangle: 3.0 mm / Tri-wing: 3.0 mm
• Spanner: 2.6 mm
• Pentalobe: P2, P5
• In the box: 1 × Proskit SD-9857M set in storage box

Why You'll Love It

• Pentalobe P2 and P5 bits handle Apple device screws that standard sets omit
• The storage box keeps all 57 pieces in fixed positions, so nothing gets lost between jobs
• A single handle fits both bit groups — no need to manage multiple drivers
• From home DIY to professional bench repair, the two CR-V bit groups cover virtually every fastener type encountered